The Smalleyed rabbitfish, (Hydrolagus affinis), is a species of fish in the Chimaeridae family. It has very wide distribution almost everywhere in northern Atlantic in depths from 300 to 2,410 metres, being most common below 1,000 metres. Its total length ranges from 32 to 147 cm. It has a short nose with a blunt tip. The small mouth is located on the lower part of the head and has thick lips. Its back slopes gradually and ends to a fine tail.