They do use that, however I do not know if it is called "tongue".
They don't lick salt, it's just trying to move but there's unfortunately salt around it w
It's like slugs, it's blood is watery and if there's salt, osmosis happens
But, it's protected by a shell so there should be no problem with salt on it's shell
Salt water and Pure salt, which has the highest concentration of salt?
The latter of course. The concentration of salt in salt water is equal to that of the clam's blood, so no osmosis.
But if it's table salt, osmosis will occur and there will be a higher concentration of salt in the blood.
Hmm... thought osmosis had to happen through liquid... solids usually dont go through membranes... or at least i dont think it can go through clams =w=
Hmm... comments seem to say they dont actually care for the salt and theyre just trying to push away and find water... =w= Cant say if either is true (since the guys in the video dont seem to know what theyre talking about and the comments dont really show proof... except that its a foot not a tongue...)
Yes, it looks like this clam just stuck its tongue out and licked up a bunch of salt. But clams don't have tongues. Let alone giant tongues that would take up most of the clam's body. In reality, that's a foot.
Have you ever looked at a mollusk like a clam and wondered whether and how it moves? That foot would be how. Clams use it for digging, because they live most of their lives buried in sand and mud. It can also be used for limited movement—usually, to get back into the water and then get reburied in the sand and mud.
Business Insider interviewed a couple of marine biologists who agree that the whole "salt-licking" thing is really just a side effect of this clam sticking out it's gooey foot. Brian Bayne, a marine researcher from the University of Sydney agreed that this clam is definitely not feeding.
"These clams live buried in mud and they get there by digging-in with a large, mobile foot (which looks convincingly like a tongue), he said. "This clam, stranded on someone's floor, is trying to dig itself back home."