Harlequin shrimp _______.

Acontrol starfish populations
Bclean parasites from select fish species
Ccontrol tubeworm populations
Dhide within coral using their special camouflage

Verified Answer :

Harlequin shrimp (a.) control starfish populations. Harlequin shrimp are very picky about what they eat but they do eat starfish. 

p.s. I took a test with the same answer and (a.) was correct

Answer: a. control starfish populations

The Harlequin shrimp is a native of salt water marine environment. It is found near the coral reefs in the Pacific and Indian Oceans. It drives nutrition by eating starfish. They are very skilled in obtaining the starfish as a prey. They firstly eat the tube feet and soft tissues and then the central disk is feeded upon.