Even if you attack the bottom, it will not get rooted easily, so you can attack the bottom of the head. The Edus can be set shorter to allow you to pinpoint the target from the bottom to the surface.
From the Manufacturer
Gamakatsu Sea Fishing Hole, Blue Swim System
Even if you attack the bottom, it will not get rooted easily, so you can attack the bottom of the head.
Edus can be set short, and the target can be aimed at a pinpoint from the bottom to the surface.