Blennies score less about their appearance than much more about their funny and adorable behavior. Many species lack a swim bladder. You will often be able to watch them near the ground, where they look around with their big eyes. Often they take direct eye contact with the aquarist - something that makes them likeable at first glance. Unlike their relatives, the group of combtooth blenny (Meiacanthus) is less demersal. They usually swim freely in the water column and willingly present themselves to the aquarist.