Ice fish
Antarctic ice fish are the only vertebrates that do not have hemoglobin – the red pigment that normally carries oxygen in blood. Their blood is almost colourless and it collects oxygen in the same way that water does – by simply dissolving it. Ice fish have to survive with about a tenth as much oxygen as normal fish and they do this by swimming slowly and by spending long periods without moving. They live on the seabed, feeding on small animal such as crustaceans.
Scientific Name: chaenocephlus aceratus
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