A walk in the park

Jezeem joins the resident bannerfish for a Sunday afternoon stroll around the Medhufaru wreck off Ratmalana.

Pinnacles of life

A few kilometers off the coast of Hikkaduwa are three rocky pinnacles rising from a sandy seabed at around 35m, with the tallest reaching up to almost 18m. The rocks look bare from a distance, but closer inspection shows they are covered in orange cup corals and green tree corals. A few black corals, whip corals and sea fans grow in deeper water while soft corals adorn current swept rock faces. Fish life is profuse. Schooling snappers, a few large sweetlips, angelfish and coral groupers waiting in ambush. Groups of anthias feeding on plankton flutter around the pinnacle tops like underwater butterflies. Today four bluefin trevally make forays among the fusiliers and blue triggerfish schooling above the rocks in a hit or miss game of underwater potluck dining. Welcome to Kirala Gala, considered by many to be the premier dive site in Hikkaduwa. But regardless of which dive site is the best there's no debating that these submerged rocks are definitely pinnacles of life.

Rocking it in Hikkaduwa!

Where better to photograph the typical rocky underwater terrain of Hikkaduwa than the aptly named "Hikkaduwa Gala" or Hikkaduwa rock. Smooth granite humps and scattered rocky boulders create an underwater landscape of small caves, canyons and swimthroughs. Coral growth is sparse but the rocks provide shelter to numerous reef fish, octopus, sea stars and sea urchins. Larger predators such as giant trevally and king mackerel make sporadic visits in search of fish that stray too far from shelter. With decent viz and gentle currents its a relaxed easy dive and a chance to experiment with some wide angle photography.

Gorgonian Garden

Off the coast of Colombo, Gorgonian Garden is one of our favorite dive sites. A garden of sea fans at a depth of around 35m creating a fantasy world of reds, yellows and oranges framed against the blue water. Sea fans are not uncommon on other dive sites around Sri Lanka but we have never come across such a dense aggregation of healthy fans. Some as large as a diver stand tall over the flat seabed, often with several feather stars sitting on top of them to find a good vantage point to catch passing plankton. Large sea fans tend to grow in areas subject to strong currents and this site is no exception. The local fishermen call the reef "Hulang Paraya" or windy reef due to its exposed location, and strong currents tend to sweep the reef on most days. However on our last dive we have near perfect conditions with flat seas, light currents and visibility of 20-25m.  The good conditions are ideal for exploring the reef and we chance upon a large coral head teeming with fish, an action packed oasis of life within the silent and serene world of sea fans.

Similan Islands: The jewels of the Andaman Sea

The Similan Islands are a group of nine granite islands in the Andaman Sea, about one hundred kilometers northwest of Phuket, Thailand. The name is derived from the Malay word Sembilan, meaning nine. These islands and surrounding marine waters comprise the Similan Islands Marine National Park, one of the most popular diving destinations in SE Asia. The reefs around the islands are famous for colorful coral gardens and a high diversity of reef fish. It is also a popular destination to see large pelagics such as manta rays and whale sharks that are attracted by nutrient rich upwellings. The western sides of the islands are exposed to seasonal rough seas and have dramatic wave eroded boulders, ledges and drop offs, while the more sheltered eastern sides have gently sloping coral gardens. 

Like many reefs in the Indian Ocean the Similan Islands suffered extensive coral bleaching in 2010 resulting in the death of many hard and soft corals. While it is possible that they will recover with time their long-term future is seriously threatened by global climate change. In order to reduce human impacts the Thai government has close off some areas from tourism in order to allow the reefs to regenerate. Seasonal closures have proven to be highly effective in allowing habitats and animal populations to recover from mass mortality events or chronic stress caused by both anthropogenic causes and natural events. We wonder if Sri Lanka could ever follow such policies, both in our marine and terrestrial protected areas.

Reflections

Either I have time travelled or else I have not been active in the water but its been more than four months since this blog has had a new post. I would like to think its the former, thus I have no reason to be depressed for not diving much, but unfortunately I have to admit its been the latter. Sitting in Sweden trying to finish off a PhD that seems to be eroding my brain rather than enhance it, my thoughts turn to the tropics. Its east coast dive season in Sri Lanka now. And whether its the shallow coral gardens of Pigeon Island and Batticaloa, or the black coral forests enveloping the majestic HMS Hermes, the tropical Indian Ocean seems a lot more inviting that the cold Baltic Sea outside my window. The ocean is so close, yet so far away.

Time to head east

The Southwest Monsoon has set in on the west coast so its time to head over to the east coast. Looking forward to a season of discovering some new dive sites. With more areas opening up its time to explore the fringing reefs between Trincomalee and Batticaloa.