Orange Roughy (Hoplostethus atlanticus) , with large blunt head, upturned mouth and small teeth. [Getty Images]

Orange Roughy (Hoplostethus atlanticus) , with large blunt head, upturned mouth and small teeth. — see more

Orange Roughy (Hoplostethus atlanticus) , with large blunt head, upturned mouth and small teeth.

Dorling Kindersley RF Dorling Kindersley