Thromidia is a genus of starfish in the family Mithrodiidae.
Description and characteristics These are unusually massive sea stars with five sausage-shaped arms, containing probably the heaviest species of Asteroidea, up to 6 kg.
Species There are four recognized species according to World Register of Marine Species: Thromidia brycei Marsh, 2009 – Western Australia Thromidia catalai Pope & Rowe, 1977 – West Pacific Thromidia gigas (Mortensen, 1935) – South-west Indian ocean Thromidia seychellesensis Pope & Rowe, 1977 – Seychelles
References