Do you think it would be alright to put a Niger in my 55 i have a maroon clown, yellow tang, damsel, 6 line wrasse, porcelain crab, purple lobster, featherdusters, yellow polyps, sponge, bubble tip anemone, brain, and gorgonia
I wouldn't. They are usually OK with corals and shelled inverts (hermits and snails), but that lobster might be trouble. Also, they should have a bit more room as they are very active fish and like open waters for swimming.
