Opalfish

The opalfish, Hemerocoetes monopterygius, is a duckbill of the genus Hemerocoetes, found only around New Zealand, at depths of between 5 and 200 m. Their length is between 10 and 25 cm.

Gallery
 File:Hemerocoetes monopterygius (Opalfish).gif|Drawing by Dr Tony Ayling File:Hemerocoetes_monopterygius_2022-09_(3).jpg|An opalfish surrounded by shells