Lamprey (belonging to the superclass
Agnatha, which means "jawless")
Lampreys resemble eels with regards to their scaleless, elongated bodies. They lack paired fins, and adult lampreys are characterized by a toothed, funnel-like sucking mouth. Of the 38 known extant species, parasitic lamprey species are most well-known. They feed by boring into the flesh of other flesh in order to suck out blood. Adult non-parasitic species do not feed but instead live off on reserves that they have acquired as larvae through filter feeding.
