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Morphology guide
Classification
Actinopterygii
Gadiformes
Melanonidae
Melanonus
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MelanonusModern Arrowtail
Scientific name:
Actinopterygii: The Actinopterygii, or ray-finned fishes, constitute a class or subclass of the bony fishes. The ray-finned fishes are so called because they possess lepidotrichia or "fin rays", their fins being webs of skin supported by bony or horny spines ("rays"), as opposed to the fleshy, lobed fins that characterize the class Sarcopterygii. In terms of numbers, actinopterygians are the dominant class of vertebrates, comprising nearly 99% of the over 30,000 species of fish. (Wikipedia)
ActinopterygiiEnvironment:
Bathypelagic: The bathyal zone or bathypelagic – from Greek bathıs, deep – (also known as midnight zone) is the part of the pelagic zone that extends from a depth of 1000 to 4000 metres (3300 to 13000 feet) below the ocean surface. It lies between the mesopelagic above, and the abyssopelagic below. (Wikipedia)
bathypelagicMesopelagic: The mesopelagic (Greek middle) (also known as the middle pelagic or twilight zone) is that part of the pelagic zone that extends from a depth of 200 to 1000 metres (~660 to 3300 feet) below the ocean surface. It lies between the photic epipelagic above and the aphotic bathypelagic below, where there is no light at all. (Wikipedia)
mesopelagicOceanodromous: Oceanodromous fish, which occur widely throughout the world’s oceans, live and migrate wholly in the sea. They differ mainly from one another by the method and extent of their migration. (Britannica)
oceanodromousMorphology:
Triangular: The base of the ichthyolith is the widest part.
triangularCurved: The overall shape of the ichthyolith curves in one direction.
curvedLong: The ichthyolith is at least three times longer than it is wide.
longCavity: The ichthyolith has a central nerve cavity. This is a base keyword included whenever an ichthyolith has a cavity, even when the cavity is further categorized with an additional keyword.
cavityCavity Wide: The ichthyolith's cavity is distinctively wide (defined as more than four times as wide as the "walls" surrounding it at its midpoint; alternately phrased, the cavity takes up more than than two-thirds of the total width of the cross-section at its midpoint).
cavity wideDoyle code:
Sample origin:
Age:
Other:
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CatFish ID: 17
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