caudal peduncle
the wrist-like portion of the posterior part of the body between the end of the anal fin and the base of the caudal fin. Its length is measured between the insertion of the anal fin and the caudal flexure (the fold shown by the hind edge of the hypural plates when the caudal fin is flexed). Depth is measured vertically at the narrowest point. Called tail wrist in angling

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • caudal peduncle — noun The narrow part of a fishs body to which the caudal or tail fin is attached …   Wiktionary

  • caudal peduncle — noun : the narrow region of the body of a fish immediately in front of the caudal fin …   Useful english dictionary

  • caudal peduncle scale count — includes all the longitudinal scale rows around the circumference of the peduncle at its narrowest point …   Dictionary of ichthyology

  • caudal peduncle of thalamus — radiatio thalami inferior …   Medical dictionary

  • peduncle — 1) caudal peduncle, pedicel (the wrist like portion of the posterior part of the body between the end of the anal fin and the base of the caudal fin. Its length is measured between the insertion of the anal fin and the caudal flexure (the fold… …   Dictionary of ichthyology

  • Peduncle — The term peduncle has several meanings:*Peduncle (botany), a stalk supporting an inflorescence *Cerebral peduncle, a band of neurons, resembling a stalk, which connect varied parts of the brain ** In insect brains, the peduncle connects the lobes …   Wikipedia

  • peduncle disease — coldwater disease (a bacterial disease of juvenile and yolk sac fry of salmonids caused by Cytophaga psychrophila (or Flexibacter psychrophilus). It occurs at temperatures below 10°C and is an external and systemic disease with lesions on the… …   Dictionary of ichthyology

  • caudal flexure — the fold formed at the end of the caudal peduncle when the caudal fin is flexed to determine the position of the posterior edge of the hypural plates. This posterior edge is often difficult to determine as a point for measurement for standard… …   Dictionary of ichthyology

  • caudal pit — the notch in the dorsal or ventral profile of the caudal peduncle just before the caudal fin in certain sharks …   Dictionary of ichthyology

  • caudal keel — noun A lateral ridge found just forward of the tail fin on the caudal peduncle of some types of fast swimming fish, that provides stability and support to the caudal fin …   Wiktionary

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