The world’s rivers deliver 19 billion tonnes of sediment to the coastal zone annually1, with a considerable fraction being sequestered in large deltas, home to over 500 million people. Most (more than 70 per cent) large deltas are under threat from a combination of rising sea levels, ground surface subsidence and anthropogenic sediment trapping2, 3, and a sustainable supply of fluvial sediment is therefore critical to prevent deltas being ‘drowned’ by rising relative sea levels2, 3, 4.

While surveying for raptors along the Achara beach in Malvan taluk of Sindhudurg district, Maharashtra, seahorses Hippocampus kuda belonging to the family Syngnathidae were noticed on the beach on 23 June 2015. All seahorses belong to one genus Hippocampus, in which there are 34 species recognized all over the world. Despite their small size, seahorses form a valuable fisheries resource in some areas and support a sizeable international trade.

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