rock grenadier
roundnose grenadier
roundhead rat-tail
coryphaenoides rupestris latin

Its common names include the rock grenadier, the roundnose grenadier and the roundhead rat-tail.

Commercial fishing for the roundnose grenadier started in the 1960s.

The roundnose grenadier is a deep water fish sometimes reaching over a metre (yard) in length.

Various fish have been observed, including blue ling, roundnose grenadier, and the orange roughy.

Rattails may be solitary or they may form large schools, as with the roundnose grenadiers.

Its common names include the rock grenadier, the roundnose grenadier and the roundhead rat-tail.

An important commercial fishery exists for the larger species, such as the giant grenadier and roundnose grenadier, Coryphaenoides rupestris.

The roundnose grenadier is a batch spawner and is believed to migrate to the vicinity of Iceland to spawn in late summer or autumn.

Coryphaenoides rupestris (Roundnose grenadier)

In 2010 in the United Kingdom, the roundnose grenadier was listed as a "UK Priority Species" for conservation purposes on the grounds that it is a long-lived fish taking many years to mature and that numbers were declining.

The researchers, from Memorial University in St. John's, Newfoundland, found a decline of 89 to 98 percent in just a 17-year span starting in 1978 in the populations of five fish species - roundnose grenadier, onion-eye grenadier, blue hake, spiny eel and spinytail skate.

Its common names include the rock grenadier, the roundnose grenadier and the roundhead rat-tail.