What is Notothenioidei?
Notothenioidei is one of 19 suborders from the order Perciformes and that primarily includes Antarctic fish and Subantarctic fish, but also a few species ranging north to southern Australia and southern South America.
What is the scientific name of Notothenia?
Notothenia is a genus of marine ray-finned fishes belonging to the family Nototheniidae, the notothens or cod icefishes with the species in this genus often having the common name of rockcod. They are native to the Southern Ocean and other waters around Antarctica .
What is a Nototheniidae fish?
The notothens or cod icefishes are the family Nototheniidae of acanthopterygian fishes. They are traditionally placed in the order Perciformes together with their relatives, but like every lineage in the order, actual phylogenetic relationships among these species have not yet been determined with certainty.
When did notothenioids appear in the Southern Ocean?
The Southern Ocean has supported fish habitats for 400 million years; however, modern notothenioids likely appeared sometime after the Eocene epoch. This period marked the cooling of the Southern Ocean, resulting in the stable, ice-cold conditions that have persisted to the present day, excepting abrupt, rapid warming in the region in recent years.