But sand isn't always boring. And in some places, sand diving offers a chance to observe some of the few pristine marine communities left in the ocean...
Read MoreLife is weird
Sometimes the staggering number of coincidences required for an animal's life cycle to succeed defy belief.
Read Morediving the magical Cape of Good Hope
The primary reactions people have to my saying I dive in Cape Town are either: But what about sharks? or Don't you get cold?
Read MoreSea Slugs: flamboyant pirates of the oceans?
They're blind hermaphrodite pirates, who live on their chemosensory wits.
Read MoreA Modern Seahorse Romance
Once a mating pair is established, and during the whole of the male's pregnancy, the female will visit daily and the pair will dance together.
Read MoreJellyfish: delightful deadly and delicious
An animal that is 98% water is not the obvious suspect to threaten an aircraft carrier. But it happened. Brainless wanderers don't seem likely to capsize a fishing trawler. But they do. A soft bag of jelly with no teeth doesn't spring to mind as the most dangerous beast in the ocean. But so it is.
Read MoreARMOURED WARRIORS
Some are as tiny as a pea; others have a leg span of 4m... Crabs are fascinating as they are, well, crabby. Naturalist Georgina Jones reveals some interesting facts about these, side-stepping marine soldiers.
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