Pholis gunnellus (Gonnelle)

Pholis Gunllus is a small fish from the Pholididae family, originally from the Côtes de l'Atlantique North-East. It is commonly known as the Castor Fish, Lateur Reton or Grenouille Fish due to its resemblance to these animals. The Pholis Gunllus has an elongated and tapered shape, with a wide head and a protractile mouth with sharp teeth. Her dress is generally brown, greyish or olive, with dark stripes on the back and sides. Castor fish can reach a maximum size of about 15 centimeters, although most individuals do not exceed 10 centimeters.

Pholis Gunllus is a gregarious fish that lives in small groups in the shallow waters of the rocky coasts and estuaries. It feeds mainly on crustaceans, molluscs and other invertebrates which he captures with his sharp teeth. Castor fish is a territorial animal and can become aggressive when it feels threatened. He can also defend himself by swelling his skin to appear larger and more scary.

Pholis Gunllus is a protected fish in certain places due to its vulnerability in the face of excessive fishing and the destruction of its habitat. Unfortunately, it is often taken by mistake in the nets intended for other species, which contributes to its decline. Due to its popularity with aquariophiles, the castor fish is also often captured to be sold as a pet. It is important to protect this species in order to preserve its population and its natural habitat.