Sandsifting Starfish Aggression?

[Magikarp]

i was looking into getting a sandsifting starfish and was wondering how aggressive they are towards shrimps and crabs? or possibly anything else the starfish might prey on aside from algae and detritus?

thanks

 

[greenbean36191]

They aren't aggressive to ornamental species, but they are predators. They do not eat algae at all and detritus only makes up a small part of their diet. They mostly feed on small mollusks and crustaceans that live in the sand.

They really have no business in a reef tank since they provide no benefit and will starve to death in all but the largest tanks.