I caught my wrasse, took me 2 hours but did what u suggested, got a platic large coke bottle, cleaned it really well, took all paper off and glue, cut out the top and put brine in bottom and submerged. He kept going in but got out before i could get bottle out so i had a net in tank from 2 days before and he was use to it, moved it over by the bottle and when he went in again, got him...My tank is so much happer and so am i, poor snails and crabs, their legs and shells are everywhere. My shrimp even comes out now...no more Wrasse's.