{"id":2837,"date":"2026-03-03T07:37:06","date_gmt":"2026-03-03T07:37:06","guid":{"rendered":"https:\/\/saveourseas.com\/sosf-darros-research-centre\/?p=2837"},"modified":"2026-03-03T07:37:06","modified_gmt":"2026-03-03T07:37:06","slug":"plankton-du-jour-darros-island-keeps-reef-manta-rays-well-fed-all-year","status":"publish","type":"post","link":"https:\/\/saveourseas.com\/sosf-darros-research-centre\/plankton-du-jour-darros-island-keeps-reef-manta-rays-well-fed-all-year\/","title":{"rendered":"Plankton <i>du jour<\/i>: D\u2019Arros Island keeps reef manta rays well fed all year"},"content":{"rendered":"<div class=\"the-content\"><p style=\"text-align: center\"><em><strong>The remote island of D\u2019Arros is home to the largest known aggregation of reef manta rays in Seychelles. New research, led by the Save Our Seas Foundation D\u2019Arros Research Centre (SOSF-DRC), has shed light on the feeding habits of these gentle giants, contributing to our understanding of when, where and why mantas use the island \u2013 information that can be used to tailor conservation strategies for this vulnerable species.<\/strong><\/em><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify\">Marine scientist Dillys Pouponeau has perhaps one of the best offices in the world. From the window of her ocean-front lab at the D\u2019Arros Research Centre, she can see reef manta rays \u2013 her study subjects \u2013 dancing just beneath the surface of the azure tropical waters that lap the island\u2019s shores. Here, on the fringes of Seychelles\u2019 Outer Islands, is the largest known aggregation of reef manta rays in Seychelles, which gather almost daily to feed beneath wheeling frigatebirds on the centre\u2019s doorstep.<\/p>\n<p style=\"text-align: justify\">The fact that reef mantas can be seen feeding consistently throughout the year sets D\u2019Arros apart from other locations in the world, where manta feeding aggregations appear to be more seasonal. One of the questions that the team at the SOSF-DRC has been focusing on is why. \u2018It means that there is something special about this place,\u2019 smiles Dillys.<\/p>\n<div id=\"attachment_2838\" class=\"wp-caption aligncenter\" style=\"width: 1024px\"><a href=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image1dillyspouponeau-saveourseasfoundationcopyright.jpg\" class=\"fresco\" data-fresco-caption=\"\" data-fresco-options=\"thumbnails:false\" ><img decoding=\"async\" class=\"size-large wp-image-2838\" src=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image1dillyspouponeau-saveourseasfoundationcopyright-1024x703.jpg\" alt=\"\" width=\"1024\" height=\"703\" srcset=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image1dillyspouponeau-saveourseasfoundationcopyright-1024x703.jpg 1024w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image1dillyspouponeau-saveourseasfoundationcopyright-300x206.jpg 300w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image1dillyspouponeau-saveourseasfoundationcopyright-1864x1280.jpg 1864w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image1dillyspouponeau-saveourseasfoundationcopyright-1536x1055.jpg 1536w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image1dillyspouponeau-saveourseasfoundationcopyright-2048x1406.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><p class=\"wp-caption-text\">Alfie the manta ray surface-feeding alongside fusiliers, with seagrass floating around like confetti. Photo by Dillys Pouponeau | \u00a9 Save Our Seas Foundation<\/p><\/div>\n<p style=\"text-align: justify\">A new study from the SOSF-DRC, led by Dillys and published in the journal <em>Frontiers in Marine Science<\/em>, offers insight into the continuous presence of reef manta rays around the island and confirms that D\u2019Arros provides a consistent food supply. Reef manta rays are filter-feeders, with a diet that consists exclusively of tiny animals \u2013 specifically copepods, shrimps, krill and crab larvae \u2013 that are collectively known as zooplankton. \u2018Because food is available all year round, the mantas are supported throughout the year,\u2019 explains Dillys, who is a research officer for the SOSF-DRC. Combined with other important factors, such as the presence of cleaning stations and lack of predators, the availability of food explains why these remote waters are so important to reef manta rays. \u2018This gives D\u2019Arros exceptional value and underscores why continued efforts to protect it are so important,\u2019 she adds.<\/p>\n<div id=\"attachment_2839\" class=\"wp-caption aligncenter\" style=\"width: 1024px\"><a href=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image2danbeecham-saveourseasfoundationcopyright.jpg\" class=\"fresco\" data-fresco-caption=\"\" data-fresco-options=\"thumbnails:false\" ><img decoding=\"async\" class=\"size-large wp-image-2839\" src=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image2danbeecham-saveourseasfoundationcopyright-1024x997.jpg\" alt=\"\" width=\"1024\" height=\"997\" srcset=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image2danbeecham-saveourseasfoundationcopyright-1024x997.jpg 1024w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image2danbeecham-saveourseasfoundationcopyright-300x292.jpg 300w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image2danbeecham-saveourseasfoundationcopyright-1315x1280.jpg 1315w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image2danbeecham-saveourseasfoundationcopyright-1536x1495.jpg 1536w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image2danbeecham-saveourseasfoundationcopyright.jpg 1539w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><p class=\"wp-caption-text\">SOSF-DRC researcher, Dillys Pouponeau, retrieves the plankton net from the water to collect a plankton sample. Photo by Dan Beecham | \u00a9 Save Our Seas Foundation<\/p><\/div>\n<p style=\"text-align: justify\">Moreover, the study sheds light on the conditions needed for the reef manta rays to begin feeding. To find this out, the SOSF-DRC conducted manta surveys by boat almost every week for a year. When the rays were encountered, the team recorded information about their behaviour, noting whether they were feeding or not, before deploying a plankton net to collect a sample from where they had been observed. These samples were then taken back to the lab on the island to be analysed, where the total biomass (the total quantity) of plankton per water volume was calculated.<\/p>\n<p style=\"text-align: justify\">The results showed that just the presence of plankton is not enough; reef mantas only start feeding when and where plankton is highly concentrated and exceeds a certain threshold. For mantas, feeding expends a lot of energy \u2013 they are continuously swimming with their mouths agape, using specialised fins to funnel plankton-rich water in to be filtered. They must consume vast quantities of their microscopic prey to sustain themselves \u2013 and this explains why they choose areas where plankton is thickest. It\u2019s like deciding to go to your favourite restaurant; the menu must be just right to warrant making the effort!<\/p>\n<div id=\"attachment_2840\" class=\"wp-caption aligncenter\" style=\"width: 1024px\"><a href=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image3henriettegrimmel-saveourseasfoundationcopyright.jpg\" class=\"fresco\" data-fresco-caption=\"\" data-fresco-options=\"thumbnails:false\" ><img decoding=\"async\" class=\"size-large wp-image-2840\" src=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image3henriettegrimmel-saveourseasfoundationcopyright-1024x739.jpg\" alt=\"\" width=\"1024\" height=\"739\" srcset=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image3henriettegrimmel-saveourseasfoundationcopyright-1024x739.jpg 1024w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image3henriettegrimmel-saveourseasfoundationcopyright-300x216.jpg 300w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image3henriettegrimmel-saveourseasfoundationcopyright-1774x1280.jpg 1774w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image3henriettegrimmel-saveourseasfoundationcopyright-1536x1108.jpg 1536w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image3henriettegrimmel-saveourseasfoundationcopyright-2048x1477.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><p class=\"wp-caption-text\">Dillys and the team collect a plankton sample near a feeding manta ray. Photo by Henriette Grimmel | \u00a9 Save Our Seas Foundation<\/p><\/div>\n<p style=\"text-align: justify\">In the study, the densest patches of zooplankton coincided with the high tide \u2013 between two hours before and five hours after \u2013 and this was when the reef mantas were observed feeding the most. Furthermore, feeding behaviour was more commonly sighted on the north to north-eastern side of the island.<\/p>\n<p style=\"text-align: justify\">These findings will be crucial for optimising conservation efforts around D\u2019Arros. In recognition of their exceptional biodiversity and global ecological importance, the waters surrounding the island have been designated as a Zone 1 Marine Protected Area or \u2018no-take zone\u2019, where extractive activities like industrial fishing are prohibited. \u2018Effective conservation practices rely heavily on detailed understanding of a species,\u2019 Dillys says. \u2018Research like this provides exactly that by identifying where, when and why mantas use the island. With this information, we can better design and implement regulations within the marine protected area that directly support their conservation, particularly by limiting activities that may interfere with their behaviour.<\/p>\n<p style=\"text-align: justify\">\u2018For example, boats sometimes cross these areas. Regulations on boat zoning and speed are therefore essential to minimise disturbance to surface-feeding mantas and reduce the risk of boat strikes, a threat recognised globally and one that has occurred in Seychelles before.\u2019<\/p>\n<div id=\"attachment_2841\" class=\"wp-caption aligncenter\" style=\"width: 1024px\"><a href=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image4henriettegrimmel-saveourseasfoundationcopyright.jpg\" class=\"fresco\" data-fresco-caption=\"\" data-fresco-options=\"thumbnails:false\" ><img decoding=\"async\" class=\"size-large wp-image-2841\" src=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image4henriettegrimmel-saveourseasfoundationcopyright-1024x683.jpg\" alt=\"\" width=\"1024\" height=\"683\" srcset=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image4henriettegrimmel-saveourseasfoundationcopyright-1024x683.jpg 1024w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image4henriettegrimmel-saveourseasfoundationcopyright-300x200.jpg 300w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image4henriettegrimmel-saveourseasfoundationcopyright-1920x1280.jpg 1920w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image4henriettegrimmel-saveourseasfoundationcopyright-1536x1024.jpg 1536w, https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/image4henriettegrimmel-saveourseasfoundationcopyright-2048x1366.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><p class=\"wp-caption-text\">Dillys photographs Tom the manta ray at the cleaning station. Photo by Henriette Grimmel | \u00a9 Save Our Seas Foundation<\/p><\/div>\n<p style=\"text-align: justify\">The secluded waters of D\u2019Arros Island offer the perfect opportunity to study these iconic creatures, which unfortunately are under threat. Reef mantas are keystone species and therefore ecologically vital; their decline would have serious consequences for underwater systems. For Dillys, understanding more about the species and its requirements is imperative. \u2018We need mantas in the ecosystem to maintain critical ecological functions,\u2019 she explains. \u2018This knowledge helps us to protect not only the reef manta ray, but also the broader ecosystems it supports.\u2019<\/p>\n<p style=\"text-align: justify\">This sentiment was central to the vision of the founder of the Save Our Seas Foundation, Abdulmohsen Abdulmalik Al-Sheikh, when he established the SOSF-DRC. \u2018D\u2019Arros is truly special and it was important to me to create a world-class field station capable of gaining the knowledge we need to adequately protect it.\u2019 He adds, \u2018That research is now having real conservation impact and will preserve the magic of D\u2019Arros for generations to come.\u2019<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>The remote island of D\u2019Arros is home to the largest known aggregation of reef manta rays in Seychelles. New research, led by the Save Our Seas Foundation D\u2019Arros Research Centre (SOSF-DRC), has shed light on the feeding habits of these gentle giants, contributing to our understanding of when, where and why mantas use the island [&hellip;]<\/p>\n","protected":false},"author":218,"featured_media":2843,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"tags":[],"class_list":["post-2837","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.1 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Plankton du jour: D\u2019Arros Island keeps reef manta rays well fed all year - SOSF D&#039;Arros Research Centre<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/plankton-du-jour-darros-island-keeps-reef-manta-rays-well-fed-all-year\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Plankton du jour: D\u2019Arros Island keeps reef manta rays well fed all year\" \/>\n<meta property=\"og:description\" content=\"The remote island of D\u2019Arros is home to the largest known aggregation of reef manta rays in Seychelles. New research, led by the Save Our Seas Foundation D\u2019Arros Research Centre (SOSF-DRC), has shed light on the feeding habits of these gentle giants, contributing to our understanding of when, where and why mantas use the island [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/plankton-du-jour-darros-island-keeps-reef-manta-rays-well-fed-all-year\/\" \/>\n<meta property=\"og:site_name\" content=\"SOSF D&#039;Arros Research Centre\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/saveourseasngo\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-03-03T07:37:06+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/saveourseas.com\/sosf-darros-research-centre\/wp-content\/uploads\/sites\/7\/thumbimagedillyspouponeau-saveourseasfoundationcopyright.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"2000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"faaizah\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@saveourseas\" \/>\n<meta name=\"twitter:site\" content=\"@saveourseas\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"faaizah\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/saveourseas.com\\\/sosf-darros-research-centre\\\/plankton-du-jour-darros-island-keeps-reef-manta-rays-well-fed-all-year\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/saveourseas.com\\\/sosf-darros-research-centre\\\/plankton-du-jour-darros-island-keeps-reef-manta-rays-well-fed-all-year\\\/\"},\"author\":{\"name\":\"faaizah\",\"@id\":\"https:\\\/\\\/saveourseas.com\\\/sosf-darros-research-centre\\\/#\\\/schema\\\/person\\\/eb7474e12bbee5febf8d4880a7213ec0\"},\"headline\":\"Plankton du jour: D\u2019Arros Island keeps reef manta rays well fed all year\",\"datePublished\":\"2026-03-03T07:37:06+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/saveourseas.com\\\/sosf-darros-research-centre\\\/plankton-du-jour-darros-island-keeps-reef-manta-rays-well-fed-all-year\\\/\"},\"wordCount\":1035,\"publisher\":{\"@id\":\"https:\\\/\\\/saveourseas.com\\\/sosf-darros-research-centre\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/saveourseas.com\\\/sosf-darros-research-centre\\\/plankton-du-jour-darros-island-keeps-reef-manta-rays-well-fed-all-year\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/saveourseas.com\\\/sosf-darros-research-centre\\\/wp-content\\\/uploads\\\/sites\\\/7\\\/thumbimagedillyspouponeau-saveourseasfoundationcopyright.jpg\",\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/saveourseas.com\\\/sosf-darros-research-centre\\\/plankton-du-jour-darros-island-keeps-reef-manta-rays-well-fed-all-year\\\/\",\"url\":\"https:\\\/\\\/saveourseas.com\\\/sosf-darros-research-centre\\\/plankton-du-jour-darros-island-keeps-reef-manta-rays-well-fed-all-year\\\/\",\"name\":\"Plankton du jour: D\u2019Arros Island keeps reef manta rays well fed all year - 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