finfish

Finfish are a broad group of aquatic animals that have a backbone (vertebrates) and are primarily characterized by their fins, which they use for swimming. They typically live in saltwater (oceans and seas) or freshwater environments. Finfish include species like salmon, tuna, cod, and mackerel. They breathe through gills, have a streamlined body suited for movement in water, and reproduce by laying eggs. Finfish are important sources of food for humans and other animals, and they play vital roles in aquatic ecosystems.