Oceans & Coastlines

Nature & Wildlife · The Sea

Oceans & Coastlines

Ringed by more than a thousand kilometres of coast, Sri Lanka lives by the sea — its reefs, lagoons, turtle beaches and fishing towns.

5 min read

An educational feature from the Nature & Wildlife collection.

01

Coral reefs

Reefs such as those at Pigeon Island near Trincomalee and Hikkaduwa on the south-west coast shelter colourful fish and corals. Like reefs worldwide, they are vulnerable to warming seas and coral bleaching.

A pufferfish at Nilaveli, on the east coast.
A pufferfish at Nilaveli, on the east coast.Photo: Satheesha J. / Wikimedia Commons, CC BY-SA 4.0

02

Coastal ecosystems

Mangroves, lagoons and seagrass beds protect shorelines and serve as nurseries for fish and shellfish, supporting both biodiversity and coastal livelihoods.

03

Marine turtles

Five of the world’s seven species of marine turtle nest on Sri Lankan beaches, including the green turtle, olive ridley and leatherback. Rekawa on the south coast is an important nesting site.

04

Fishing communities

Fishing families along the coast use everything from traditional oru outrigger canoes to modern multi-day boats, and fish markets remain lively hubs of coastal life.

Did you know

Interesting facts

01

Five of the seven marine turtle species nest in Sri Lanka.

02

Pigeon Island is a protected marine national park.

03

Mangroves help protect coastlines from erosion and storm surges.

References & further reading

Content is summarised from the sources above for educational purposes. LANKA. is an independent publication.