Octopus

The Octopus is an unlockable fish with 2 evolutions

Ink Cloud
Creates a cloud of ink that hinders the enemie's sight and slows all enemies in a larger radius. The player who used the Skill is able to see through the ink. The slowdown lasts longer than the ink

Sticky Ink Storm
Bigger slowdown effect

Sticky Ink Hurricane
Bigger slowdown effect. Slight damage added

Strategy
Use Ink to catch up with small fish and keep larger fish away. The slowdown is massive once evolved, has a higher radius than the ink and lasts longer. Ink can be used quite often but it's expensive, so be careful not to waste it.