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The common name of these fish is related to their bizarre, tubular eyes. The genus name Gigantura refers to the Gigantes , a race of giants in Greek mythology —coupled with the suffix oura , meaning 'tail', thus Gigantura refers to the greatly elongated, ribbon-like lower half of the tailfin that may comprise over half of the total body length.
In fish a countercurrent flow (lower diagram) of blood and water in the gills is used to extract oxygen from the environment. [6] [7] [8] All basal vertebrates breathe with gills. The gills are carried right behind the head, bordering the posterior margins of a series of openings from the esophagus to the exterior.
The Arctic cisco (Coregonus autumnalis), also known as Arctic omul (Russian: Омуль), is an anadromous species of freshwater whitefish that inhabits the Arctic parts of Siberia especially Yenisey Gulf.
The series focused on the domestic side of Fish's life: he and Bernice became foster parents to a racially-mixed group of five children known as "Persons in Need of Supervision" or PINS. The kids were played by Todd Bridges , Denise Miller , Len Bari, John Cassisi , and Sarah Natoli.
Foureye butterflyfish usually frequent shallow inshore waters, where they feed on a variety of invertebrates, mainly zoantharians, sea anemones, scleractinians, [6] polychaete worms, gorgonians, tunicates, crustaceans and fish eggs. [7] This fish is known for its uncanny ability to swim in and around coral heads and reefs.
Fish meal is used as a food supplement for farmed fish and for livestock. Fish oils are made either from fish liver, especially rich in vitamins A and D , or from the bodies of oily fish such as sardine and herring, and used as food supplements and to treat vitamin deficiencies.
At up to 2.5 metres (8 ft 2 in) and weighing up to 260 kilograms (570 lb), it is among the larger bony fishes. Southern bluefin tuna, like other pelagic tuna species, are part of a group of bony fishes that can maintain their body core temperature up to 10 °C (18 °F) above the ambient temperature.
This fades as the fish matures. The dorsal, anal and pelvic fins are all vivid yellow in colour. [3] The dorsal fin has 12 spines and 23-24 soft rays while the anal fin has 3 spines and 18-19 soft rays. This species reaches a total length of 20 centimetres (7.9 in). [2]