Choanate
Having a funnel, i.e., with a ring or collar.
Choanate– passage from the external nostrils to the mouth cavity for inhalation of air while the mouth is closed, allowing inhalation while in the water by placing nostril openings above water, as seen in tertrapods.
Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..
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