Whats this

Hi Im not sure what type of coral this is can any one give me it's name and what the best conditions are for it?

Its an anenome not sure what kind though

rock anenome possibly

I have seen that anemone referred to as a Long Tentacle Anemone.

aiptasia

I have the same anemone! I don't know anything about it either.

Is it good or bad? Does it get big or stay small??

aiptasia nuke it with joes juice and watch it shrivel and die. aiptasia and bubble algae, the two things i absolutely hate.

watarah? deff not long tenticle haha