This image of a spiny lumpsucker (Eumicrotremus orbis) was taken by NOAA photographer David Csepp. Lumpsuckers are named because of their nearly spherical bodies and modified pelvic fins, which have evolved into adhesive discs. The fish use these discs to stick to rocks and other surfaces. They are poor swimmers and spend most of their time on or near the sea bottom. The spiny lumpsucker is found throughout the northern Pacific Ocean. It feeds on invertebrates such as worms, crustaceans and mollusks.