Who is that animal that which is unicellular in nature but needs to work in group fot the living.?

Coral.Who is that animal that which is unicellular in nature but needs to work in group fot the living.?
i dont know the answer sorry, buy coral isnt a unicellular organism..Who is that animal that which is unicellular in nature but needs to work in group fot the living.?
You are thinking of slime molds (moulds)
amoeba is the only unicellular
the social amoeba perhaps? Dictyostelium discoideum. the really weird one which exists as a single cell organism until it gets together with a whole bunch of other ones to make a fruiting body with a stalk and spores on the top? i couldnt find a proper movie of it doing its thing, but theres some pictures here ---%26gt;
I only know of unicellular organism that requires other stuffs such as decayed material to survive. Would you consider Euglena as an answer?