Cod Worm

A Cod Worm is a Para-Bite in an immobile shell that can be found in Chapter 4. It stays in its shell and will spew a burst of blood shots if shot at. After some time, it will reveal itself and become vulnerable to attacks.

Trivia

 * A cod worm is an aquatic parasite of marine fish.
 * Cod worm has a resemblance to the Pokémon Shuckle.
 * Prior to Booster Pack #5, if a Cod Worm was killed before enemies finished spawning, the Cod Worm would die, even in its invincible form.