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Fish eyes are similar to the eyes of terrestrial vertebrates like birds and mammals, but have a more spherical lens. Birds and mammals (including humans) normally adjust focus by changing the shape of their lens, but fish normally adjust focus by moving the lens closer to or further from the retina .
If he says "no", he is a fish crow." referring to the fact that the most common call of the American crow is a distinct "caw caw", while that of the fish crow is a nasal "nyuh unh". [14] The fish crow also has a single call sounding like "cahrrr". [15] Blue-green sheen visible on feathers
Commercial fish. Blue-barred parrotfish (Cateau) Body of female is orange-yellow with bluish vertical patterns on the side. Body of male is green on dorsal side; pale-blue stripes are present on the ventral side and there is a pink salmon shade on each scale. The fish is equipped with a parrot-like beaked shaped mouth to scrape algae from corals.
A fairly large marine fish for the aquarium with a royal blue body, yellow tail, and black palette design on their body. A star on the silver screen, as Dory in the Disney/Pixar movie Finding Nemo .
The eyes are usually red with black pupils. Different varieties sport different markings and colors. The green mandarin is the fish that has been described. The red mandarin is the same species, but its pelvic fins and what would be orange is red. In some rare cases, the entire dragonet is red with black stripes.
The brilliant iridescent colors of the peacock's tail feathers are created by structural coloration, as first noted by Isaac Newton and Robert Hooke.. Structural coloration in animals, and a few plants, is the production of colour by microscopically structured surfaces fine enough to interfere with visible light instead of pigments, although some structural coloration occurs in combination ...
Hooded crow (Corvus cornix) in flight Jungle crow (Corvus macrorhynchos) scavenging on a dead shark at a beach in Kumamoto, Japan. Medium-large species are ascribed to the genus, ranging from 34 cm (13 in) of some small Mexican species to 60–70 cm (24–28 in) of the large common raven and thick-billed raven, which together with the lyrebird represent the larger passerines.
Researchers believe they've recorded potentially the first-ever sighting of an adult abyssal fish, Melanocetus johnsonii, in broad daylight. Normally found at depths between 200 and 2,000 meters ...