Colorful fish with iridescent stripes

NEON TETRA

This small, peaceful freshwater fish is a favorite in aquariums for its bright blue and red hues, often found schooling in South American rivers.

This clue describes a small, brightly colored fish known for its shimmering blue and red stripes. "Neon tetra" fits perfectly because it’s a popular aquarium fish with vivid, iridescent markings that glow under light. The word "colorful" hints at its striking appearance, while "iridescent stripes" directly points to the neon-like glow it’s famous for. No wordplay here—just a straightforward description of the fish.