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Results for “gill opening”

Ichthyological terms, not general ones.

Species 2Articles 1Glossary 7

  • gill opening

    Opening connecting the gill chamber to the exterior environment. Also referred to as the gill slit.

    Used in 83 profiles

  • operculum

    Flap composed of 4 bones that covers, supports and protects the gill opening in many fishes. Also known as gill flap or gill cover.

    Used in 64 profiles

  • spiracle

    An external respiratory opening, located between the eye and gill opening in certain, usually primitive, fishes.

    Used in 13 profiles

  • lateral scale rows

    The number of more-or-less vertically-arranged scale rows present between the upper end of the gill opening and the caudal fin base. Sometimes referred to as vertical scale rows and used in meristic counts when the lateral line is absent, incompletely pored or otherwise difficult to distinguish.

    Used in 9 profiles

  • branchiostegal membrane

    The membrane, sometimes referred to as the gill membrane, connecting the branchiostegal rays and enclosing the ventral portion of the branchial cavity. Normally extended when the opercle of a fish is open, sealing the branchial cavity and creating a vacuum in the mouth, and also used during threat, courtship and other communicative behaviours in many species.

    Used in 5 profiles