Order : Dendrochirotida
Biology : Sea apples are holothurians or sea cucumbers.
However, unlike other sea cucumbers, they do not feed on debris found in the sand. They feed primarily on plankton and other waterborne particles.
They have very large and branched tentacles that allow them to capture as many particles as possible.
When a tentacle has captured enough particles, it shoves its entire arm into its mouth to gobble them up. This is why they are sometimes referred to as “finger suckers”.