New to FT2 with a few questions!

Hello all ~
I've started playing FT2, just found it a few days ago. Happy to see it here. I'm not seeing a lot of postings on this though. I'm interested to know how many are playing it?
One of my biggest initial questions is of course about the Magic fish and the breeding.
I've not seen a list of the Magic Fish for FT2. Is there one?
Also, I'm looking to see if there is a (hopefully short) list of fish you DON'T want to sell if you happen to get them. Not Magic Fish of course, but those fish that help with breeding others that are hard to get, or might only come in eggs.
For example, the first fish I've tried to complete is the Fatfish. I sold the silky that I got with eggs in the beginning (not knowing) and the only way to breed it is with three other fish that are all related. Like these four fin types are circularly related (Silky, Imperial, peachy and hooked) I can't get any of those four in eggs and don't even know if they are rare, uncommon or common.
Thanks! Tessie

Daresay you've figured it out, but hey, maybe someone else will want to know (I've got PC though).

KEEP SILKY and SPINED!
They cannot be bred, except as you say, with themselves. (Silky breeds, but requires one parent to be a silky... which defeats the purpose!)

NOTE:
There are a couple of other species that are difficult to obtain as well. This is more complicated; several of them will pop up in RARE fish, so the others only have a couple of crossing choices.

I've got a complete spreadsheet but I don't know how to share it.

Can't remember the genuses offhand, but I don't think they're as difficult, just keep going...