Did you know: a sunfish can be bitten and it just keeps swimming along?

Yes, the giant ocean sunfish (or Mola mola) is famous for its almost comical ability to get bitten, lose chunks of flesh, and just keep drifting along as if nothing happened.

Their unflappable, "zero-care" attitude comes down to a few wild biological quirks: [1]
• They Literally Don't Feel It: A sunfish's incredibly thick, rubbery skin has very few to no pain receptors, meaning they don't feel the bites.

No Tail = No Escape: Sunfish don't have a traditional tail fin. Because they can't dart away quickly, they don't even bother trying to flee when a predator, like a sea lion, takes a bite.

The "Living Spa": Because they are covered in parasites, they float sideways at the surface to let birds pick them clean, and allow other fish to take bites to remove dead skin and pests.

Evolutionary Survival: Predators (like sharks or sea lions) often lose interest because sunfish taste terrible, are full of parasites, and are mostly just bone and tough, stringy collagen. They survive purely through sheer numbers; a single female can lay up to \(300\) million eggs at once.