When I got my first betta, I asked a friend what I should name him, and she suggested Leviathan because bettas are pretty angry apparently
I went with the name and continued the theme!
Eris -Sure, Eris is the GODDESS of discord, and my Eris is a male, but it's DISCORD that Eris rules over so whatever! In any case, I loved how different his dorsal fin was compared to his chocolate body! Definitely wasn't something I saw in any of the other fish.
Timor -The Roman personification of dread and fear. I felt a lot of that when I saw how beautiful he was but how close to death he seemed in his cup (he died in less than 24 hours).
the Kraken -He was so angry in his cup :( Too angry for any of that god/goddess nonsense. He's just a spirited sea monster