The Shark Ray or Guitar fish with fins similar to that of sharks and upper body similar to a ray
In the animal kingdom, there are species that look alike, or ‘hybrids’, between two or more creatures. Marine creatures with such features often go unnoticed, but the fish caught in nets off the southern coast puzzled many as it appeared like a shark and a ray (‘mora’ and ‘maduwa’ in Sinhala, respectively).
This strange fish had ‘shark like’ fins and tail. However, its head looks like a ray and had ray-like ‘wings’. The fish photographed by Devsiri Peiris last month is said to have been caught accidentally in a fishing net. It is about five feet long and a male.
“It is a fish we call ‘shark ray’, known by fishermen as ‘thith mora’’’, says Rex I. De Silva – an expert on sharks. “Despite its Sinhala name, it is not a shark but a ray,’’ he says.
The shark ray is scientifically named as Rhina ancylostoma also called mud skate as it is found in sandy bottoms doing bottom feeding. Due to the shape of its head the fish in this group is also known as ‘guitarfish’. The one caught is a Bowmouth Guitarfish. According to literature, this large species can reach a length of 2.7 m (8.9 ft) and weight of 135 kg (298 lb). They are found in depths of up to 90 m (300 ft).
Shark expert, Mr de Silva says the species is rare. “Nevertheless the species appears in very small numbers from time-to-time in fish markets. I have seen them at Negombo, Kalmunai and Kirinda markets,” Mr De Silva says.
The Red List of Threatened Fauna by IUCN categorises the shark ray as ‘Vulnerable’ to extinction. Other than getting caught in fishing nets, dynamite fishing, bottom trawling pose a threat to shark rays. Habitat degradation and destruction too threaten this rare fish.
Source – 09/04/2017/ The Sunday Time, See more at – http://www.sundaytimes.lk/170409/news/rare-bottom-dweller-is-a-vulnerable-fish-236477.html
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