Weber's Chromis
Weber's Chromis
Weber's Chromis
© François Libert
Fishes · Bony fishes · Pomacentridae

Weber's Chromis

Chromis weberi Fowler & Bean, 1928
syn. Chromis simulanis, Chromis simulans, Pomacentrus weberi
13.5 cm3-40 mLeast Concern
772

Weber's Chromis, scientifically known as Chromis weberi, is a vibrant tropical fish found in the warm marine waters of the Indo-Pacific region. Its habitat spans from the 🌊 Red Sea and East Africa, stretching to the Line Islands, reaching as far north as southern 🇯🇵 Japan, and extending south to 🇳🇨 New Caledonia (🇫🇷 Overseas France). This particular species is associated with coral reefs and prefers to dwell at depths ranging from 3 to 40 meters. What's particularly interesting about Weber's Chromis is that it is a non-migratory fish, which means it stays within a specific area rather than migrating long distances.

These fish are relatively small, with a maximum length of about 13.5 cm. In their natural environment, adults can be spotted either alone or forming groups of varying sizes, from small gatherings to large aggregations, especially around reef passes and steep outer reef slopes. Their behavior is diurnal, meaning they are active during the day, which is common among many reef fish.

Reproduction in Weber's Chromis involves distinct pairing during the breeding season. They are oviparous, which means they lay eggs rather than giving birth to live young. The eggs of this species are demersal; they tend to sink and stick to the substrate at the bottom. An interesting parental behavior is observed in males, who take on the responsibility of guarding and aerating the eggs to ensure their development.

Thus, Weber's Chromis is a fascinating species not just for its striking presence in Indo-Pacific reefs but also for its intriguing reproductive habits and social structures.

Why it's threatened

There are no known major threats.

Threat classification from the IUCN Red List.

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Last Update: June 28, 2026