Want to collect all fish and aberrations? Use Atrophy.

[Karcel]

A few days ago I finished getting all the currently doable achievements.
I learned that atrophy is a great skill to use if you want to quickly get all the fish and aberrations.

Here is what I learned about atrophy:
If you reach a fishing spot of a yet unkown fish you will likely not get an aberration by using atrophy.
If you discovered the fish already but didn't have the aberration then atrophy will surely get you an aberration.
If a fish has two aberrations then the atrophy spell will always get you the aberration you do not yet have.

So, in practice, if you still need to discover a fish and that fish has 2 aberrations. Then you need to find three spots of this fish and use atrophy. This will guarantee you getting the fish and then later the aberrations.

Hope this helps some people who are desperately trying to get an aberration for a rare fish and didn't have the luck yet.

[RCMidas]

You can also pick up a bunch of bait from the airman to create fishing spots at will in the general vicinity of the fish you need. No waiting for respawns needed.

[James.greywolf]

Atrophy, bait, the correct fishing pole, and the right area will get you what you need from the list. I needed a Whithered Ray (Devil Ray Aberration) off of Gale Cliffs. I docked there, picked up bait, and put away all fishing poles but one which only catches Ocean fish. When ready, I pulled about 10 feet away from the dock, dropped bait, and used Atrophy. All I could catch were Rays and Sturgeons. If I got what I wanted, I moved on to the next fish I needed. If I didn't, I quit, restarted, and was sitting back at the dock waiting to make the same move over again.