Gulp Missile
If a Cramorant with Gulp Missile uses Surf or Dive, it catches prey and changes its form depending on its remaining HP.
Full effect
When the Pokémon uses Surf or Dive, it will come back with prey. When it takes damage, it will spit out the prey to attack.
In game description
When the Pokémon uses Surf or Dive, it will come back with prey. When it takes damage, it will spit out the prey to attack.
Pokemon with Gulp Missile
Using Gulp Missile in Cobblemon
Abilities are passive and always active, so Gulp Missile costs you nothing to run. If it is marked hidden on a species above, expect it to be harder to obtain: servers differ in whether hidden abilities come from breeding, an Ability Patch, or events.
See the Pokedex for which abilities each species can have, and IVs, EVs and breeding for how to actually pass one down.