I had been waiting months for my LFS to get more Farlowella Acus (Stick fish/Twig fish). I stopped in last Sunday, they finally had them, so I picked one up.
Yes, I know, not an impulse buy. That comes next.
I started acclimating the fish, and noticed that it had a different tail fin, and slightly different coloration than an F.Acus. I quickly identified it as Farlowella Gracilis.
The impulse buy comes Monday, when I wonder if the LFS has both F.Gracilis and F.Acus. I go back, and they do, so now i've got two different Farlowella cats I also got two female bettas. My other two looked lonely?
I also almost impulse bought a completely eyeless male betta, but my roommate ended up picking it up. A fish with no eyes and those long fins wouldn't stand a chance in my tank.