Animal field guide
Yellowbelly Damselfish
Amblyglyphidodon leucogaster
Yellowbelly Damselfish teaches Shelter Loyalty by working the water column above one coral head and never straying past the distance it can fall back through.
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Get AnimalDexYellowbelly Damselfish at a glance
Animal · Native range keys: indian_ocean · Hovers in loose groups a short · Relatively common
Known for: Pale silver-grey body with a distinctly yellow belly, Hovers in loose groups a short distance above, Drops into the coral branches the moment a larger, Deep
Understand the animal
Understand the Yellowbelly Damselfish
Factual biology first: what this animal is like, where it lives, how it survives, and why those traits exist.
01
Introduction to Yellowbelly Damselfish
Yellowbelly Damselfish teaches Shelter Loyalty by working the water column above one coral head and never straying past the distance it can fall back through.
How to identify a Yellowbelly Damselfish
- Pale silver-grey body with a distinctly yellow belly
- Hovers in loose groups a short distance above branching coral
- Drops into the coral branches the moment a larger fish approaches
- Deep, laterally compressed damselfish body about 13 cm long
Why Yellowbelly Damselfish are interesting
- It picks plankton out of passing current rather than grazing the reef surface.
- Its whole feeding range is set by how fast it can get back into the coral it shelters in.
- Males clear a patch of hard substrate, then guard the sticky eggs laid on it until they hatch.
- It is one of the damselfishes most often seen over branching Acropora in the Coral Triangle.
- The yellow belly is easiest to see from below, against the light.
02
Adaptations and biological abilities
03
Why does Yellowbelly Damselfish behave this way?
- Pale silver-grey body with a distinctly yellow belly
- Hovers in loose groups a short distance above branching coral
- Drops into the coral branches the moment a larger fish approaches
- Deep, laterally compressed damselfish body about 13 cm long
Yellowbelly Damselfish are active by day and settle deep into coral branches at night, wedging into a crevice where a hunting predator cannot follow.
04
Why Native range keys: indian_ocean?
Habitat: Native range keys: indian_ocean, south_pacific, coral_triangle. Sheltered lagoon and reef-slope coral, especially branching stands, suits Yellowbelly Damselfish because Shelter Loyalty needs a refuge close enough to reach in one dash.
Native range: Native range keys: indian_ocean, south_pacific, coral_triangle. Sheltered lagoon and reef-slope coral, especially branching stands, suits Yellowbelly Damselfish because Shelter Loyalty needs a refuge close enough to reach in one dash.
Native range
Natural range, not this specific capture location.
Some regional overlays are unavailable in this web build.
Native range keys: indian_ocean, south_pacific, coral_triangle. Sheltered lagoon and reef-slope coral, especially branching stands, suits Yellowbelly Damselfish because Shelter Loyalty needs a refuge close enough to reach in one dash.
05
Why this diet?
Zooplankton taken from the current, with some algae and small benthic invertebrates. This diet supports Shelter Loyalty because the food comes to the fish, so it never has to leave its coral head to find a meal.
06
Activity, rest, and lifespan
Yellowbelly Damselfish are active by day and settle deep into coral branches at night, wedging into a crevice where a hunting predator cannot follow.
Yellowbelly Damselfish live several years on a reef, so Shelter Loyalty becomes learned ground — the fish knows its own coral head far better than any newcomer could.
07
Yellowbelly Damselfish reproduction
Females lay adhesive eggs on a cleared patch of substrate and the male guards and fans them until hatching. Offspring fit the principle because the nest is placed inside the same shelter the adults depend on.
Males and females look closely alike, with males distinguished mainly by nest-guarding behaviour. The similarity fits a species whose survival rests on a shared shelter rather than on display.
08
Predators, threats, and defense
Groupers, lizardfish, trevally and other reef hunters. Its answer is not speed over distance but distance kept short — it never puts more water between itself and the coral than it can cross in a moment.
09
Conservation and rarity
Rarity: Relatively common · 41/100. AnimalDex canonical rarity score: 41/100, maintained by the live indexed species profile.
- Observe from a respectful distance and avoid changing the animal's behavior.
- Do not block feeding, shelter, nesting, or travel routes.
- Use a live camera capture without handling or staging wildlife.
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Where to find them
Where to find Yellowbelly Damselfish
To find Yellowbelly Damselfish in the wild, focus on the exact habitat patches that match its body design and daily behavior, not just the broad country where it exists. You usually do better by working one good piece of habitat inside native range keys: indian_ocean, south_pacific, coral_triangle. Sheltered lagoon and reef-slope coral, especially branching stands, suits Yellowbelly Damselfish because Shelter Loyalty needs a refuge close enough to reach in one dash. than by covering too much ground.
- Quiet marsh edges, reedbeds, river bends, or shallow wetland margins
- Headlands, reef edges, island colonies, tidal channels, or productive coastal water
- Sunlit logs, exposed branches, warm rocks, or regular perch sites used for scanning
Animal field guide
Yellowbelly Damselfish
Yellowbelly Damselfish teaches Shelter Loyalty by working the water column above one coral head and never straying past the distance it can fall back through.
Native range
Natural range, not this capture location
Native range keys: indian_ocean, south_pacific, coral_triangle. Sheltered lagoon and reef-slope coral, especially branching stands, suits Yellowbelly Damselfish because Shelter Loyalty needs a refuge close enough to reach in one dash.
Search near meAnimalDex stats
Dominance
24
Speed
52
Size
10
Intelligence
22
Rarity
41%
Total
149
Size scale
Scientific name
Amblyglyphidodon leucogaster
Category
Animal
Habitat
Native range keys: indian_ocean, south_pacific, coral_triangle. Sheltered lagoon and reef-slope coral, especially branching stands, suits Yellowbelly Damselfish because Shelter Loyalty needs a refuge close enough to reach in one dash.
Rarity
Relatively common · 41/100
Native range
Native range keys: indian_ocean, south_pacific, coral_triangle. Sheltered lagoon and reef-slope coral, especially branching stands, suits Yellowbelly Damselfish because Shelter Loyalty needs a refuge close enough to reach in one dash.
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