Super Narwhal and Jelly Jolt by Ben Clanton

A Narwhal and Jelly Book #2

Happy-go-lucky Narwhal and no-nonsense Jelly find their inner superheroes in three new under-the-sea adventures. In the first story, Narwhal reveals their superhero alter-ego and enlists Jelly to help Narwhal figure out what their superpower is. Next, Narwhal uses their superpower to help a friend find his way back home. In the third story, Jelly is feeling blue and Narwhal comes to the rescue.