It delivers headbutts with the water bubble on its head. Small Pokémon get sucked into the bubble, where they drown.
Despite what its appearance suggests, it cares for others. If it finds vulnerable, weak Pokémon, it protectively brings them into its water bubble.
It usually passes its time in the water. When its belly is full, it stores its subdued prey in the water bubble on its head.
It has a habit of storing things it values in its water bubble. If its Trainer doesn’t watch out, Araquanid will try to put them in its bubble!