Which unique physiological feature allows *Apalone spinifera* to remain submerged for long periods?

Answer

Oxygen absorption through specialized mouth and cloaca linings

The softshell's ability to absorb oxygen through specialized linings in its mouth and cloaca enables it to stay submerged underwater for extended durations while waiting for aquatic prey.

Which unique physiological feature allows *Apalone spinifera* to remain submerged for long periods?
dietreptileTurtlespiny turtle