It has small electric sacs on both its cheeks. If threatened, it looses electric charges from the sacs.

Difficulty : *****

Tested, logical.
If you need some help, you can :
- use edge-logic with the 6 from row R22, after using it with the 3 from R23.
- use edge-logic with the 7 from R19, after using it with the 4 from R20.
- notice the influence of the 6 from C25 on the 2 from C24.
Good blackenage.