A Quandary

Riddle: What do you call a grey tube that has tough skin, exhales carbon dioxide, and can exhale and inhale water?

Answer: An elephant’s trunk.

Source: https://www.riddles.com/index.php/7882

What do you call a grey tube that has tough skin, exhales carbon dioxide, and can exhale and inhale water? — A quandary by Pole v1.

Riddle: What do you call a grey tube that has tough skin, exhales carbon dioxide, and can exhale and inhale water? Answer: An elephant’s trunk. — by Pole v2.