Found singly or in groups on shallow sand and gravel areas as well as seagrass beds. Colour varies from place to place. Large sea star, with five conical, short, thick arms. They feed on molluscs, worms, detritus and sponges.
Lambis truncata is the largest and heaviest of spider shells, up to 40 cm.Lambis truncata is similar to Lambis lambis but with a more squarish outline. Younger shells are creamy white; columella and lip usually mauve brown when older.
In varying amounts, depending on the species, Sarcophyton leathers will warp their upper surface and direct the water flow by forming ridges that lead to feathery pinnules on their tentacles. These feathery pinnules are designed to sieve the water for nutrients. The capitulum (top) has autozooid and siphonozooid polyps that are rather long when extended. When the polyps are completely retracted, the surface has a very smooth look to it.