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2) the lower part of the body of fish, the belly.
pertaining to the abdomen. Pelvic fins are said to be abdominal when they lie behind the posterior tip of normally developed …
the part of the body containing the viscera or guts, liver, ovaries, testes, kidneys, etc.
oedema, an accumulation of excess fluid in the abdomen, causing abdominal swelling and marked protrusion of scales. Also …
those bony fishes having pelvic fins in the abdominal position.
an external aperture near the vent communicating with the abdominal cavity. Found in Cyclostomata, Elasmobranchii, and in …
paired dermal ridges running from pectoral to pelvic fin bases in sharks.
an abdominal spine, formed from a scale in the ventral region of the fish body. A series of these serrae form a saw-like …
one of the anterior vertebrae bearing ribs but lacking the haemal arch, canal and spine of caudal vertebrae,Â q.v.