It is impossible to take survival tridents that were thrown in creative mode.

Steps to Reproduce:

1- Throw a trident in creative mode.
2- Switch to survival mode.
3- Clear your inventory, (by preference using commands)
4- Go to the trident that you threw and try to take It.
5- The trident wont go to your inventory.

You Can ser the glitch video here: https://youtu.be/RdD8_RZQugw