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Results for “caudal-fin”

Ichthyological terms, not general ones.

Species 155Articles 5Glossary 29

  • caudal-fin

    Also referred to as the tail fin, it's main purpose is thrust and propulsion.

    Used in 790 profiles

  • principle caudal-fin rays

    Fin rays forming the dorsal or ventral margins of the caudal fin, supported by the supported by the hypural and parahypural.

    Used in 1 profile

  • vertical fin

    Unpaired, median fin, i.e., dorsal, caudal, adipose and anal fins.

    Used in 1 profile

  • epural

    Located on the dorsal side of the caudal fin; elongate bone which supports the caudal fin rays, positioned above the urostyle and posterior to the last neural spine.

    Used in 8 profiles

  • unpaired fins

    The dorsal, caudal, anal and, if present, adipose fins.

    Used in 61 profiles

  • caudal

    Towards the poterior or caudal fin.

    Used in 320 profiles

  • caudal filament

    Filamentous extensions of the caudal fin tips seen in some fishes.

  • anal-fin

    A median, unpaired, ventral fin located between the anus and caudal fin, usually in the posterior portion of the body. Used to maintain equilibrium and stability.

    Used in 764 profiles

  • caudal peduncle

    The typically narrow section of the body located between the posterior of the dorsal and anal fins and caudal fin origin. Its depth is measured vertically at the narrowest point.

    Used in 394 profiles

  • standard length

    Measurement taken from the tip of the snout to the midlateral, posterior edge of the hypural plate or posterior edge of the last vertebra, thus excluding the caudal fin. May also exclude the length of the lower jaw should it project beyond the snout. It is the standard scientific measurement used for most fish species because the caudal fin easily becomes damaged in preserved specimens. Abbreviated to SL.

    Used in 48 profiles

  • postdorsal length

    The distance between the dorsal fin insertion/origin and caudal fin base.

    Used in 2 profiles

  • keel

    Ridgelike structure located on the ventral surface, caudal peduncle or caudal fin base in certain fishes.

    Used in 35 profiles

  • fork length

    Length of a fish specimen measured from the tip of the snout to the end of the medial caudal fin rays, i.e., the deepest point of the 'fork' formed by the fin. Tends not to be used in systematics.

  • total length

    Straight line measurement of specimen's length taken from the tip of the snout to the tip of the longer lobe of the caudal fin, if applicable, and not taking the curve of the body into account. If the caudal lobes are of equal length they may be compressed along the midline before the measurement is taken. Abbreviated to TL.

    Used in 6 profiles

  • acuminate

    Tapering or pointed. Used to describe the shape of the caudal fin in some fishes.

    Used in 59 profiles

  • emarginate

    Having a notched margin or edge. Often used in reference to a caudal fin with a slightly concave shape.

    Used in 101 profiles

  • epaxial lobe

    Section of the caudal fin located between the base and dorsal margin.

  • forked

    Divided or separated into two branches; shaped like a fork. Used to describe the shape of the caudal fin in some fishes.

    Used in 106 profiles