Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
I want to put forward Rivalry because male squids are aggressive when mating. Lol idk
Tbf having no other ability would be fine because no one uses it anyway
Illuminate
Suction Cups
Liquid Ooze
White Smoke
Magma Armor
Heatproof
Sticky Hold
Pressure
No Flavor Ability
Limber could have some merit on a Scarf set, since our other abilities are not particularly defining. Pressure was added because it got some good last minute support.