Fish May 2026

: Critical evolutionary steps included the shift of gills from filter-feeding to oxygen absorption, and the development of the jaw, which transformed fish into active predators. Major Biological Groups 11 Fun facts about fish - BC SPCA

: The Devonian period (roughly 419–359 million years ago) saw a massive explosion in fish diversity, including armored placoderms and the first ancestors of modern sharks and bony fish. : Critical evolutionary steps included the shift of

: It was from lobe-finned fish that tetrapods—four-limbed vertebrates—eventually evolved and moved onto land, leading to all modern land animals, including humans. and the development of the jaw