-Solved-
 

I opened up my inventory and I have four Beta Fish items. I assume it's a glitch and I'm only supposed to have one, but I'm not sure. Help?

-The question has been solved.-

Nope, you're supposed to have four! The betas were promised a set of both fishies and Anka, and the fishies have four poses. So to wear all four poses you need four of them, hence your four fishies! They're all for you, so enjoy ^^

Everyone who received the beta fish item received 4 of them, as well as 8 of the phoenix anka item :D

Oh, I see. (:

Fictions:
The eight poses for the Anka item, or eight sets with each pose? xD

just the 8 poses of Anka.

Okay, got it. (; Thank you guys. The deal with items and poses confuses me easily.