In the context of fishkeeping, Sea Angel is a common trade name for Mono fish (specifically Monodactylus argenteus and Monodactylus sebae).
These are distinct from the biological "Sea Angel" (Clione limacina), which is a tiny, translucent predatory sea snail found in cold arctic waters.
The Mono "Sea Angel" (Monodactylus)
Appearance: They have a striking diamond-shaped, flat body that is shiny silver with two vertical black bars through the eye and gill area.
Water Type: They are euryhaline, meaning they can live in different salinities. Juveniles are often found in freshwater or brackish estuaries, but adults generally require full marine (saltwater) conditions for long-term health.
Behavior: Highly active schooling fish that thrive in groups of five or more. They are known for being peaceful but can be "pushy" or nervous if kept alone.
Diet: Omnivorous and greedy eaters. They accept flakes and pellets but need vegetable matter like spirulina, blanched spinach, or dried seaweed (Nori) to prevent health issues.
Quick Care Stats
Feature
Requirement
Tank Size
Minimum 50–120 gallons (200L+) due to size and swimming needs.
Max Size
Up to 10–11 inches (27 cm) in the wild, typically 6–8 inches in captivity.
