hey y'all! im super new to keeping fish. I currently have a 10 gallon with a male betta, a kuhli loach, a pair of shrimp, a pair of endless, and something. I was *told* that it was a pair of neon tetras, but once I got them home it became very clear that only one really was. the other looks to me like some kind of guppy? but im really not sure at all. does anyone know what she could be? (ive been calling her 'she' because all of the fish are named after agents of shield lol. she's Simmons).