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Results for “ventral”

Ichthyological terms, not general ones.

Species 33Articles 1Glossary 32

  • ventral

    Of, on, or relating to the underside of an animal or plant; abdominal.

    Used in 233 profiles

  • ventral-fin basket

    Vernacular nerm used to describe the post-spawning behaviour of cupping or clamping of the ventral fins in order to transport fertilised eggs. Exhibited by females of some Corydoras species, for example.

  • ventral-fin

    Either of the pair of fins, also known as pelvic fins, attached to the pelvic girdle in fishes that help control the direction of movement. Correspond to the hind legs in higher vertebrates and vary in position depending on taxon. Sometimes absent entirely.

    Used in 74 profiles

  • ventral disc

    A sucking disc formed by the pelvic fins in certain fishes.

  • ventral keel

    Fleshy, longitudinal ridge running along the abdomen and caudal peduncle in some fishes.

    Used in 13 profiles

  • dorsoventral

    Positioned or orientated between the dorsal and ventral surfaces.

    Used in 3 profiles

  • lateroventral

    Located or orientated on the side towards the base or bottom.

    Used in 1 profile

  • parahypural

    Most ventrally-located of the hypural elements.

  • basibranchial

    Of, being, or relating to a median ventral cartilage or bony element located at the ventral point of a branchial arch, behind the tongue if the latter is present.

  • adipose crest

    Fatty ridge of flesh extending along the dorsal or ventral surface of the caudal peduncle in certain fishes, e.g., some Schistura spp.

    Used in 7 profiles

  • 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

  • axillary process

    A modified, often elongate, scale or group of scales located at the base of the pectoral or ventral fins in some fishes.

  • basibranchial teeth

    Teeth on the median ventral plate (base of the tongue) overlying the basibranchial bones between the gill arches in some fishes.

  • body depth

    The vertical distance between the dorsal and ventral margins of the body measured at the base of the pectoral fin where it joins the body. In most icthyological works the greatest dimension, normally anterior to the dorsal fin, is taken but in some cases body depth is measured at the origin of pectoral, pelvic and first anal. Fins or fin bases are not included in the measurement, however.

    Used in 85 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

  • clavicle

    Refers to the collar bone in human anatomy. Present in the pectoral girdle of some fishes as a paired, dermal bone ventral to or fused with the cleithrum.

    Used in 1 profile

  • cleithrum

    Major bone of the pectoral girdle. Extends upward from the pectoral fin base and forms the rear margin of the branchial cavity. Articulates with the supracleithrum dorsally, the scapula and coracoid ventrally. Also known as proscapulum.

    Used in 4 profiles

  • countershading

    Form of camouflage in which an organism possesses darker pigmentation on the parts of the body exposed to light and paler on those normally shaded. Many fishes are coloured darker dorsally and lighter ventrally for this purpose.

    Used in 4 profiles