The most striking feature of this species is in the fins, in fact the second dorsal, caudal and anal are fused together as in eels.

[1] Juveniles of Plotosus lineatus form dense ball-shaped schools of about 100 fish, while adults are solitary or occur in smaller groups of around 20 and are known to hide under ledges during the day.

[1] Adult P. lineatus search and stir the sand incessantly for crustaceans, mollusks, worms, and sometimes fish.

It has evolved long ampullary canals in its electrosensory organs (originally termed "ampullae of Lorenzini").

[7] This implies that this species cannot be imported, bred, transported, commercialized, or intentionally released into the environment in the whole of the European Union.