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Results for “embryo”

Ichthyological terms, not general ones.

Species 0Articles 0Glossary 13

  • embryo

    A young, unborn or unhatched organism in the process of development.

    Used in 11 profiles

  • cartilage

    Specialised, toughened, elastic, fibrous connective tissue found in various parts of the body and forming the temporary skeleton in embryonic and very young fishes, but mostly lost as the majority of species mature. Retained throughout life in cartilaginous fishes.

    Used in 26 profiles

  • chondrocranium

    Primitive, cartilaginous skeletal structure enclosing the brain and inner ear formed in the embryo and usally becoming ossified at a later stage. Retained as cartilage throughout life in some fishes.

  • egg

    Object laid by a female bird, reptile, fish, or invertebrate, normally roun or oval-shaped and containing a developing embryo surrounded by nutrient material and a protective case or shell; a female gamete; an ovum.

    Used in 1,063 profiles

  • eyed egg

    A fish egg within which the embryo has developed to a point whereby the eyes are visible through the external membrane.

  • gestation

    Period of embryonic development in a viviparous organism.

    Used in 31 profiles

  • lecithotrophy

    Literally, 'feeding on yolk'. A form of development in which an embryo receives no nutrition other than the yolk contained within its egg.

    Used in 1 profile

  • matrotrophy

    Reproductive strategy in which the embryo is supplied with additional nutrition from the mother, applied to some viviparous fishes.

    Used in 1 profile

  • ontogeny

    The origin and development of an individual from embryo to adult.

    Used in 15 profiles

  • ovoviviparity

    Reproductive strategy in which fertilisation occurs internally and the eggs develop inside the body of the mother until hatched, at which point live offspring are born. There is no placental connection between mother and embryo unlike in viviparous species.

  • rudimentary

    In biology, incompletely developed; embryonic; vestigial.

    Used in 37 profiles

  • yolk

    Substance in an animal egg consisting of protein and fat that nourishes the developing embryo.

    Used in 112 profiles

  • yolk sac

    A membranous sac containing yolk attached to the ventral surface of embryos and early larvae in some fishes. Retained for a period post-hatching in those species which form yolk sac larvae.

    Used in 221 profiles