Actinopterygii (Ray-Finned) Fish

An Actinopterygii (Ray-Finned) Fish is a bony fish characterized by fins which are webs of skin supported by bony or horny spines ("rays").

Context:
- It can range from being a Fresh Water Ray-Finned Fish to being a Saltwater Ray-Finned Fish.
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Example(s):
- a Salmoniformes fish, such as: salmon and trout.
- a Scorpaeniformes fish, such as: sablefish and rockfish.
- a Perciform Fish, such as a Bass or Perch.
- a Cypriniform Fish, such as a Carp or Goldfish.
- A Scombriformes fish, such as: tuna and mackerel.
- An Anguilliformes fish, such as: eel.
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Counter-Example(s):
- a Sarcopterygii (lobe-finned fish), such as: coelacanth and lungfish.
See: Oarfish, Osteichthyes, Sarcopterygii, Paedocypris.

References

(Wikipedia, 2020) ⇒ https://en.wikipedia.org/wiki/Actinopterygii Retrieved:2020-5-12.
- Actinopterygii, or the ray-finned fishes, constitute a class or subclass of the bony fishes. The ray-finned fishes are so called because their fins are webs of skin supported by bony or horny spines ("rays"), as opposed to the fleshy, lobed fins that characterize the class Sarcopterygii (lobe-finned fish). These actinopterygian fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the link or connection between these fins and the internal skeleton (e.g., pelvic and pectoral girdles). Numerically, actinopterygians are the dominant class of vertebrates, comprising nearly 99% of the over 30,000 species of fish. ^[1] They are ubiquitous throughout freshwater and marine environments from the deep sea to the highest mountain streams. Extant species can range in size from Paedocypris, at , to the massive ocean sunfish, at , and the long-bodied oarfish, at .