Filming in water can be challenging, but Nigel Marven has got some hints and tips for you!
You may not think you have much in common with fish, but...
Electric eels were a sensation when they were first brought to this country!
Male seahorses really are a fish like no other, keeping their young in a special pouch.
Seahorses are a remarkable fish with the males becoming pregnant with the female's eggs.
Electric eels are famed for their ability to produce an electric shock.
There are as many species of coral in deep sea reefs as in their warm water counterparts.
A world of wildlife beneath the waves.
Exploring the deep blue sea's weird, wonderful and creepy inhabitants.
Nigel Marven sets out on another adventure, this time focusing on grey whales.
Trevor Hutton is self-trained but South Africa has always cautioned against the sport.
One of the most wide-spread mammals on the planet, they inhabit every ocean.
Fish come in a vast range of sizes and design.
There are over 470 species of shark. See some of them in action.
Sir David Attenborough on the gigantic blue whale.
Sir David Attenborough talks about Earth's oceans.