Nudibranchs - Naked Gills
The Red Sea is home to wide a varied family of Gastropod and none are more colourful than the sea slug or nubibranch.
Nudibranch literally means “naked gills” and in most cases these are easily seen as they are often external and can resemble flowery type growths on the body of the animal.
I love going for a dive and taking photos of these creatures. Mainly because they are slow moving and easy to photograph, albeit not always easy to spot.
They don’t have to be fast moving to outrun anything that might eat them as their vibrant colours warn other animals that they are highly poisonous to eat.
However, they are carnivores themselves and will readily eat anything they come across that is small enough to fit into their mouths which are equipped with a rasping like tongue.
One of the more common is the Red Sea chelidoura - chelidonura livida - which can grow up to 5 cm in length.
They are carnivourous on worms and other molluscs and have brilliant blue spots on a perfect black body, very contrasting.
Another common nudibranch is the Pyjama Slug - chromodoris quadricolour - 
which can grow as big as 4.5 cm
I hope to add more nudi photos from my travels and would love to see photos from other contributors
If you want one of the most definitive guides to fish, coral, sea slugs and just about everthing esle you might encounter whilst diving in the Red Sea tehn take a look at the Red Sea Reef Guide by Helmut Debelius
Red Sea Reef Guide
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