Bright Blue-and-Red Small Aquarium Fish
Puzzle 20 of Aquarium Easy Pack
Question is: Bright Blue-and-Red Small Aquarium Fish
and the answer is: NEONTETRA
Word Meaning:
NEON TETRA — Paracheirodon innesi (syn. Hyphessobrycon innesi), a small, tropical American fish, popular as an aquarium fish.
Definitions from Wiktionary.