All photographs are the original work of Nishan Perera, and cannot be used without the written consent of the photographer. Unauthorized use of images is a violation of intellectual property rights and may be subject to legal action.

Monday, March 21, 2011

Worm dance

Polyclad flatworms closely resemble nudibranchs in external appearance. The main distinguishing characteristic is the absence of external gills that are found on nudibranchs. This species is known for its free swimming behavior that makes it appear as if it is dancing in the water. It will actively swim in the water column to move from part of the reef to another. The worm dance may be a popular break dance move but flatworms give it a whole new meaning!

Monday, March 7, 2011


Close up of a semicircle angelfish (Pomacanthus semicirculatus). This species is common on coral and rocky reefs in Sri Lanka, being most common on reefs with ledges and caves, as well as shipwrecks. Large angelfish are territorial, and males tend to defend a harem of several females. They are capable of making a loud clicking or thudding noise with their swimbladders and it is not uncommon for divers to hear this if a large angelfish is disturbed. Angelfish posses a cheek spine, as is visible in this photograph. This is the main distinguishing characteristic between angelfish and the closely related butterflyfish that do not posses such a spine.

Wednesday, March 2, 2011

Back to Cargo Wreck

We never get enough of the Cargo Wreck. Just 20 minutes boat ride away its got to be one of the best wreck dives in Sri Lanka. Whether you are a tech diver looking for a wreck to penetrate or just a casual diver looking for a fish filled dive the Cargo Wreck ticks all the boxes. With everything from resident pipefish and marble rays to visiting eagle rays and tuna there is something to see no matter what the sea conditions or visibility is like. After hundreds of dives here I'm still not tired. In fact, the more you get to know the wreck the more enjoyable it seems to become.