Chris and Martin explore the Caribbean Sea and learn how fish use their fins to swim--or fly!

Chris and Martin witness a mother Walrus and mother Polar Bear fight each other to rescue their babies.

The Kratts crew watch the mother lemur while she uses her teeth to groom her baby.

Aviva challenges the brothers to prove the creature powers of these little birds and if they do, she will create a Chickadee Creature Power Suit.

A minituarized Martin has been following Hero the Salmon on her Salmon run. They both swim into Aviva, who is standing in the river. Aviva and Martin follow Hero on part of her journey, when they get to one of Hero's obstacles, a waterfall.