The ability to give the player oxygen (via smootch) is cool and a great early game replacement for the scuba gear but they should be more impactful in the game. Maybe they could heal dinos underwater like a Daedon (Some salamanders regenerate entire parts of their body) or when on water give a hidration buff that affects all allied dinos. They are clearly not combat creatures but a TLC that gave them water related support abilities would make them more interesting and worth taming.