The common eel has a round, elongated body and a continuous dorsal fin which joins with the ventral fin at the tail. The dorsal fin starts well down its back, near to the vent than the gills and the pectoral fin is rounded.
The coalfish is similar to the pollack in body shape although the larger specimens tend to have a rounder cross section. The first anal fin starts below the gap between the first and second dorsal fin.
The gilthead bream has the typical deep, flat profile bream shape. It has a distinct bump on the head above the gills. The front teeth are sharp and pointed whereas the others are flat for crushing.
The black bream is a deep bodied, fully scaled species with a relatively small head and spiny single dorsal fin. The back of bream is darkish blue-grey merging into silvery-grey on the sides.