Aviva challenges the Kratt Brothers to a fencing competition. But they will only accept the challenge if she makes a creature power suit for one of the three kinds of billfish - Swordfish, Marlin, and Sailfish. Meanwhile, Zach starts collecting fish from the ocean.
Note: Featured animals are in bold.
- Atlantic Blue Marlin (called Blue marlin)
- Atlantic Sailfish (called Sailfish)
- Shortfin Mako Shark (called Mako shark)
- Frigate Tuna
- Zach mentions he lost the fishing contest to Gavin from "Bass Class".
- This Episode reveals that Chris and Martin aren't fighters.
- This Episode reveals that Aviva and Zach did fencing at Science Camp.