[@Cao the Exiled] Awesome entrance!
You still have Movement, Action, Bonus Action, etc. for your turn, if there's anything you would like to do. 

Jub, Brutrumukk, and Aurora are 20 feet out into the water. Jub is 5 feet under the surface, while Aurora and Brut are 20 feet deep. 

You can roll Perception if you would like.