Nocturnal species aquarium fish
Here's a list of nocturnal species suitable for aquariums: 1. Nocturnal catfish (such as Synodontis species) 2. Dwarf crayfish (such as Cambarellus species) 3. Ghost shrimp 4. Kuhli loaches 5. African dwarf frogs 6. Siamese algae eaters (they are more active at night) 7. Certain species of tetras (like Black Neon Tetras) 8. Certain species of cichlids (like Blue Rams) 9. Bristlenose plecos 10. Certain species of eels (like the Tire Track Eel)