TIL Sloths can hold their breath up to 40-minutes underwater; Dolphins can hold it for only 20 minutes.

https://www.forestwildlife.org/how-long-can-a-sloth-hold-its-breath/

https://www.reddit.com/r/todayilearned/comments/15xkfnu/til_sloths_can_hold_their_breath_up_to_40minutes/