Also known as Filamentous Horse Conch, Horse Conch, Spindle Shell, Tulip Shell.
Found during the day in shallow waters beneath dead coral slabs, coming out to feed at night over lagoons and seaward reefs.
They feed nocturnally on invertebrates and other snails.
Length - 12cm
Depth - 2-20m
Widespread Indo-West Pacific
Horse Conches are long and spindly with high spired shells, often found encrusted in algae. (edit) Ref: https://en.wikipedia.org/wiki/Filifusus_filamentosus