I have a Hammer's Cobalt Blue Lobster in a 20Gal with 12 little danios for about a month. Everything in fine, no attempt by the lobster/cray to eat any fish. Water parameters fine, but it seems the little gal keeps trying to climb the plants to get to the top. I have had her for about a month so don't think these particular species need access to surface with adequate filtration and bubble wall. She just seems to have started this climbing behavior. Is her continued attempt to reach the top normal or is she trying to breathe air? Would appreciate feedback as I know some cray species need air, but couldn't find anything online that this particular species needing this.