Types of Guppies - The guppy (Poecilia reticulata), also known as millionfish and rainbow fish, is one of the world's most widely distributed tropical fish, and one of the most popular freshwater aquarium fish species.
Bettas are completely underrated. Beautiful, tough, and often full of personality. Whenever someone asks me about what fish to buy as a beginner fishkeeper I ALWAYS recommend bettas. Probably my all-time favorite type of freshwater fish.