A fisherman has reported having his boat rammed and almost toppled over by a giant man-eating shark.
An increase in ocean acidity is making clownfish deaf and vulnerable to predators.
Scientists fear the non-native lionfish may be taking over the Caribbean reefs in great numbers.
A mutant crab with three pincers has been fished up in a lobster pot off the coast of Northumberland.
Capuchin monkeys have come up with their own tool-conserving method to fish for termites.
Whale sharks could prove to be even bigger than first thought at over 20 metres in length.
Over two thousand fish floated dead to the surface after a strange object had hovered overhead.
The permanantly miserable looking blobfish is facing extinction due to overfishing.
Biologists have discovered a remarkable fish, the European eelpout, that suckles its young.
An angler in the US had quite a shock when a fish he'd caught bit him with distinctly human-like teeth.
A new study in to the behaviour of the flying fish has revealed that it can stay in the air for a staggering 45 seconds.
Angler Raphael Biagini managed to catch an enormous koi carp thought to be the largest ever caught in the wild.
Large numbers of enormous Humboldt squid have been devouring livestock and even attacking humans.
The Indonesian mimic octopus has the unusual ability to pass itself off as a variety of other sea creatures.
Russian fisherman have called for an investigation in to 19 deaths attributed to a lake monster in Siberia.
An experimental remote-controlled robotic fish has been accepted by a wild shoal as one of their own.
In an intriguing new experiment scientists have altered the brain of a fish so that it resembles that of another.
A new study has revealed that Jupiter's moon Europa is rich enough in oxygen to support millions of tons of fish.
Shoals of robotic fish could be released in to harbour waters in an attempt to detect and track pollution.
Modern humans could owe their existence to a mass extinction of fish that happened 360 million years ago.