from The Century Dictionary and Cyclopedia
- n. A genus of siphonate bivalve mollusks, of the family Tridacnidæ, or giant clams, and very near Tridacna itself, having closed valves, two cardinal teeth, and a small byssus. H. maculatus of the Indian ocean is known as the bear's-paw clam.
- n. A genus of acalephs: usually misspelled Hippopas.
Sorry, no etymologies found.
Tridacnid calms such as crocus calm Tridacna crosea, giant clam T. gigas (VU), scaly calm T. squamosa (LR) and horse's hoof (Bear paw) clam Hippopus hippopus (LR) are found in some parts of the lagoon.
Among the bivalves the most remarkable for the size and weight of the shells are the tridachna and hippopus.