Cause there is algae that grows on the side of the tank, and that's what the starfish eat.
no they eat seaweed and plankton
no and never because frogs don't live in the ocean and starfish eat small fish and plankton there is NO way for a starfish to eat a frog EVER!
Fish do eat starfish depending on the eatign characteristics
crabs,starfish,seals,winkles,small fish
no sponges do not eat small fish they move slowly across the ground like starfish and eat bacteria of rocks and coral.
the starfish
They eat calms, oysters, mussels, small fish, sea snails , and barnacles
I saw some small star fish for sale in the marine section at Pets at home
no There is no such thing as chocolate starfish so they can NOT eat coral.
I a star fish nice towards other fish (are other fish nice towards a starfish)
Star+Fish=Starfish =)
No. Goldfish are freshwater fish and tropical starfish are saltwater fish.