Leatherfin lumpsucker, Eumicrotremus derjugini
Leatherfin Lumpsucker, Eumicrotremus derjugini

The lumpfish family includes a number of fish whose bodies are short, compressed, and generally solid looking. The leatherfin lumpfish is no exception. It is a small (no more than 8 cm in length), stout-bodied fish that has much of its head and body covered in small bony tubercles. The sucking disc (modified pelvic fins) is smaller than that of the Atlantic spiny lumpfish and is often used to distinguish between the two species. The head is bluntly rounded but large, representing 60% of the total body length. The rest of the body slopes quickly down to a narrow caudal peduncle. The fins are generally short and heavily built.

This species is commonly found in the stomachs of cod caught in Ungava Bay. However, specimens have also been found in Hudson Bay, off the Labrador coast, and in the Barents, Kara, and Nordenskiold seas.