Crocodiles eat stones to dive deeper!
Looks like crocodiles also get deeper when they’re stoned.
Crocodiles intentionally ingest stones and, if they’re large enough, rocks. This serves a couple purposes. For one thing, it aids crocodiles with their digestion. For another, it adds weight to them so that they are able to stay submerged under water. Usually, they only ingest enough to keep them submerged for an hour.
On average, crocodiles contain 10-15 pounds of stone in it's stomach. The stones must fill them up as crocodiles are not heavy or frequent eaters. Since they are slow-moving and cold blooded, they can survive on about the same amount of food as a bird.