These are most scuba divers idea of classical Cucumbers – a sort of large, ugly, very slow moving caterpillar. They actually perform essential reef cleaning work, filtering large amounts of dirty sand every year – not beautiful, but beneficial all the same.
Bohadschia vitiensis is a distinctively shaped and coloured deposit feeder, often found partially buried in the sand.
A common Sea Cucumber on the reef - it always seems to have sand sticking to it.
These beasts have a charming defence mechanism; they eject a load of sticky stuff - known as Cuvierian Tubules - on their attacker.
This Sea Cucmber is known as the Sandfish - even though there's nothing at all fishy about it!
A few Holothuriidians with dubious identities.
This Sea Cucumber used to be in the genus Bohadschia. The juvenile mimics the toxic nudibranch Phyllidia varicosa.