Reminds me of that roman account of how native britons liked to stay submerged up to their necks in swamps for long periods of time.

>>16263524

"There are two principal races of the Britons, the Caledonians and the Maeatae, and the names of the others have been merged in these two.
The Maeatae live next to the cross-wall which cuts the island in half, and the Caledonians are beyond them.
Both tribes inhabit wild and waterless mountains and desolate and swampy plains, and possess neither walls, cities, nor tilled fields,
but live on their flocks, wild game, and certain fruits...They dwell in tents, naked and unshod, possess their women in common,
and in common rear all the offspring. Their form of rule is democratic for the most part, and they are very fond of plundering;
consequently they choose their boldest men as rulers....

They can endure hunger and cold and any kind of hardship;
for they plunge into the swamps and exist there for many days with only their heads above water,

and in the forests they support themselves upon bark and roots,
and for all emergencies they prepare a certain kind of food, the eating of a small portion of which, the size of a bean,
prevents them from feeling either hunger or thirst" (Roman History, LXXVII.12.1-4).