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A captive leucistic axolotl, perhaps the most well known form of the axolotl Face of a common or wild type axolotl The speckled wild type form Axolotl's gills (Ambystoma mexicanum) A sexually mature adult axolotl, at age 18–27 months, ranges in length from 15 to 45 cm (6 to 18 in), although a size close to 23 cm (9 in) is most common and ...
16.5 cm (6.5 in) Boulengerochromis microlepis: 90 cm (35 in) Callochromis pleurospilus: 10 cm (3.9 in) Chalinochromis brichardi: 12 cm (4.7 in) Cyathopharynx furcifer: 21 cm (8.3 in) Frontosa cichild: Cyphotilapia frontosa: 40 cm (16 in) Frontosa cichild: Cyphotilapia gibberosa: 40 cm (16 in) Herring cichlid, sardine cichlid: Cyprichromis leptosoma
In the midwater region of the deep sea, predators cannot see below but can sometimes use the small amount of light available to see shadows above them. Cyclothone fishes have small bioluminescent spots on their ventral (bottom) side that cause them blend in with the surrounding light, allowing them to remain unseen to predators below.
The olm's body is snakelike, 20–30 cm (8–12 in) long, with some specimens reaching up to 40 centimetres (16 in), which makes them some of the largest cave-dwelling animals in the world. [ 13 ] [ 14 ] The average length is between 23 and 25 cm. [ 15 ] Females grow larger than males, but otherwise the primary external difference between the ...
[15] [16] The common mudpuppy never leaves its aquatic environment and therefore does not undergo morphogenesis; however, many salamanders do and develop differentiated teeth. [17] Aquatic salamander teeth are used to hinder escape of the prey from the salamander; they do not have a crushing function. [17] This aids the salamander when feeding.
The Atlantic goliath grouper was historically referred to as the "jewfish", and there are several theories as to the name's origin. A 1996 review of the term's history from its first recorded usage in 1697 concluded that the species' physical characteristics were frequently connected to "mainstay caricatures of anti-Semitic beliefs", whereas the interpretation that the fish was regarded as ...
Porcupinefish are medium-to-large fish belonging to the family Diodontidae from the order Tetraodontiformes [2] which are also commonly called blowfish and, sometimes, balloonfish and globefish.
The Mediterranean horse mackerel (Trachurus mediterraneus), also known as the Black Sea horse mackerel, horse mackerel, Mediterranean scad, common scad, or simply scad, is a species of mackerel in the family Carangidae found in the eastern Atlantic from Bay of Biscay to Mauritania, including the Mediterranean Sea.