A list of my favorite images of fish.
List #2 may be viewed here: www.listal.com/list/favorite-images-fish-2
A fish is any member of a paraphyletic group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups.
Most fish are ectothermic ("cold-blooded"), allowing their body temperatures to vary as ambient temperatures change, though some of the large active swimmers like white shark and tuna can hold a higher core temperature.
Fish are abundant in most bodies of water. They can be found in nearly all aquatic environments, from high mountain streams (e.g., char and gudgeon) to the abyssal and even hadal depths of the deepest oceans (e.g., gulpers and anglerfish). At 32,000 species, fish exhibit greater species diversity than any other group of vertebrates.
The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts.
Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods.
40 votesMy Aquatic Animals Collection (37 lists)
list by kathy
Published 4 years, 8 months ago
8 votesAnimals - F (11 lists)
list by kathy
Published 1 year, 10 months ago
People who voted for this also voted for
The Beauty of the Rain
Down by the River
Water Droplet - Liquid (Photography) Art (-2-)
Animal Faces - 2
Aoshima - Cat Island.
More lists from kathy
Favorite Images of Insects
Favorite Images of Elephants #1
Favorite Images of Snakes
Favorite Images Of Seahorses
Favorite Images of Pigeons & Doves
Favorite Images of Octopuses
Favorite Images of Big Cats