REP: The Finsuckers

Finsuckers are small, marine animals that live attached to the bodies of bigger animals. Basically, the different species have two ways of feeding: either they use their special developed upper jaw to catch plancton or they make themself useful by eating old skin and parasites off the animals they live on. Their short,broad lower jaw is a part of the sucking organ. Due to their fin structure they are bad swimmers and have only two breathing holes at their front.