‘Twilight Zone’ Fish Swim Silently With Forked Tails

2016-02-16T19:05:56+00:00 February 16, 2016|
Tail shape predicts depth range in fishes . Coral reefs are typically thought to occur in shallow, sun-lit waters, but new technology is revealing that reefs in the ocean's 'twilight zone', 50-150 m deep, support diverse and unique communities. (credit : Richard Ling/ Wikimedia Commons)

(Click to enlarge) Tail shape predicts depth range in fishes . Coral reefs are typically thought to occur in shallow, sun-lit waters, but new technology is revealing that reefs in the ocean’s ‘twilight zone’, 50-150 m deep, support diverse and unique communities. (credit : Richard Ling/ Wikimedia Commons)

An international team of researchers has identified a way to predict which reef fish can live across a greater range of depths, increasing their chances of surviving natural disasters such as cyclones and coral bleaching.

(From Science Daily) — Study lead author, Dr Tom Bridge from the ARC Centre of Excellence for Coral Reef Studies at James Cook University, says the research, published in the journal Proceedings of the Royal Society B, found that tail shape can help predict if a fish is likely to exist across a range of water depths.

“We found that the ‘caudal fin aspect ratio’, which measures the shape of the fishes tail, is the best predictor of which fish can live in a range of deep and shallow reefs.” Dr Bridge says.

“In other words, fishes with more forked tails are significantly more likely to be found in both shallow and deep habitats than species with more rounded tails.”

Read the full article here: http://www.sciencedaily.com/releases/2016/01/160120143740.htm