Fish may have evolved from an animal similar to a coral-like sea squirt (a tunicate), whose larvae resemble early fish in important ways. The first ancestors of fish may have kept the larval form into …

Dec 21, 2025 · Most important for the evolution of fishes and vertebrates in general was the early appearance of bone, cartilage, and enamel-like substance. These materials became modified in later …

May 12, 2025 · The first vertebrates on the planet, prehistoric fish lay at the root of hundreds of millions of years of evolution. Here's what you should know.

Jul 27, 2025 · Explore the incredible journey of fish evolution, tracing life’s aquatic origins and the pivotal innovations that shaped vertebrate diversity.

Jul 29, 2025 · It unfolded over millions of years, as certain fish gradually evolved the ability to breathe air and move beyond the confines of their watery realms. These pioneering vertebrates laid the …

By the end of the Triassic, bony fish species went through a similar radiation of species to that of the sharks of the Devonian and had laid the groundwork for the development of most modern fish.

Dive into the fascinating evolution of fish 🐟. Explore adaptive mechanisms, environmental impacts, genetic variation, and human influences on diverse species.

Dec 1, 2025 · Following extinction events, relative populations shifted, and, by the end of the Paleozoic era (250 million years ago), bony, ray-finned fish dominated vertebrate populations in the aquatic …

Oct 3, 2025 · The origin and evolution of fish traces back over 500 million years, beginning with jawless, armored forms and diversifying into the vast array of species inhabiting our planet today, …

The sections below describe the pre-Devonian origin of fish, their Devonian radiation, including the conquest of land by early tetrapods, and the post-Devonian evolution of fishes.