Fish
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alternatives to animals in research, aquatic organism
Scope Note
any of numerous cold-blooded strictly aquatic craniate vertebrates that include the bony fishes and usually the cartilaginous and jawless fishes and that have typically an elongated somewhat spindle-shaped body terminating in a broad caudal fin, limbs in the form of fins when present at all, and a 2-chambered heart by which blood is sent through thoracic gills to be oxygenated.
Facts
- any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills.
- the flesh of fish used as food
