8.3. Slender (pelagic) armourhead
There are three species of armourhead: slender (Pseudopenta-ceros wheeleri), pelagic (P. richardsoni) and longfin (P. pectoralis).P. wheeleri, then commonly (if erroneously) called ‘‘pelagic’’ armourhead, was the target of large fisheries in the North Pacific. Slender armourhead are relatively short-lived (11 years) and fast-growing compared to orange roughy. They spend several years as