Well, my user name is actually a meme and inside joke. I was looking up some different kinds of deep sea fish to reference for a Deep One costume sketch, and I found a picture of the black scaleless dragonfish among the many anglers. I looked it up, saw that it had a meme made about it (NOTICE ME SENPAI!) and a friend and I on a different site began using it as my nickname since I used it for my avatar. It just kinda stuck, and I thought it was hilarious despite the fact that I rarely watch anime anymore.
My fursona, of course, is an anthro black scaleless dragonfish named Glowstick. I picked the name because of the dragonfish's chin lure, which kinda reminds me of a glowstick on a lanyard. Glowstick is basically me, of course, with the addition of being a lot less shy. And I chose a fish because I think they are quite fascinating, and in many cases adorable (puffer fish and koi especially). Plus I'm a bit of a Halloween nut, so having a 'sona that was both cute and creepy depending on the light was perfect.