In my opinion there's never a bad time to hope for upcoming limited-time only fish. So, with that in mind, I offer these suggestions for your consideration:
MLK's Birthday - Martin Luther Kingfish Valentine's Day - BarraCupid St. Patrick's Day - Green Beeracuda Cinco de Mayo (Mex.) - Fish Taco 4th of July (USA) - Independence Ray Passover - Bassover Superhero Fish - Caped Cod Miscellaneous Fish: Fishstick, Sea Biscuit, Sea Squirt, Glam Clam, Squid Rock, Rocktopus
And for next Halloween, everyone's favorite scary barnyard fowl(or foul) - The Poultrygeist
I actually loaded a couple of seasonal named fish on 2 of my wizards that don't even fish at all! And when I started the fish reset Here are fish names that I saw Kiss Fish: (Most likely a Valentine's Day Fish) Shamrock Fish: (Most likely a St. Patrick's Day Fish) Fall Fish: (Most likely a fall seasonal fish like the Cold Cod)
I'm not saying these are in the game i'm just saying i've loaded them in the Commons randomly.
Here are fish names that I saw