The Fish Assemblages of Colombo’s Shipwrecks

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Mar 27, 2026
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Shipwrecks off Colombo aren’t just relics; they’re thriving underwater ecosystems️. Artificial reefs formed by these wrecks are showing higher fish densities than nearby natural sandstone reefs, transforming steel structures into shelter for vibrant marine life. Research by Anjleen Hannak, Oscar Puebla, and Nishan Perera highlights how schools of snappers, fusiliers, and cardinalfish are turning these sites into biodiversity hotspots. From abandoned vessels to living reefs, Colombo’s shipwrecks are reshaping the story of marine life in Sri Lanka. But as interest in wreck diving grows, experts stress that any push toward tourism must put conservation first. Footage courtesy of Anjleen Hannak

Video edited by Anushka Wirekoon

A Sunday Times report by Tharushi Weerasinghe for #EarthShorts with support from Earth Journalism Network.