Hawaiian ruby cardinalfish (Apogon erythrinus)

Scientific name: Apogon erythrinus Snyder, 1904

Hawaiian ruby cardinalfish (Apogon erythrinus)

The Hawaiian ruby cardinalfish (Apogon erythrinus) is a marine fish of the family Apogonidae. Native range: Eastern Central Pacific, known only from the Hawaiian Islands and Johnston Island. Reports of occurrence in other Indo-West Pacific countries are questionable.

Biology

Dorsal spines (total): 7; Dorsal soft rays (total): 8-9; Anal spines: 2; Anal soft rays: 8. Differs from other members of the A. erythrinus complex by having the following characteristics: from all others by having a much longer second dorsal fin spine, reaching to at least the base of third ray of second dorsal fin when depressed (spine in other species do not reach third ray); from A. indicus by having 14 pectoral fin rays (versus 13, rarely 12 or 14), and by lacking pigment on the dorsal surface of the caudal peduncle (present in A. indicus); from A. marquesensis by lacking scattered chromatophores on sides of caudal peduncle that extend anteriorly as a band from caudal fin base to vertical from ends of dorsal and anal fin rays (pigment extends forward as a band in A. marquesensis); from A. susanae by having pigment present on scale edges at front of second dorsal fin and sometimes along its base and scattered chromatophores on caudal fin base (absent in A. susanae)

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Apogon erythrinus
Family
Apogonidae (Cardinalfishes)
Order
Perciformes (Perch-like fish)
Class
Actinopterygii (Ray-finned fishes)
Maximum length
4.0
Depth range
1–48 m (3–157 ft)
Environment
Marine; reef-associated; depth range 1 - 48 m
Climate
Tropical
Distribution
Eastern Central Pacific: known only from the Hawaiian Islands and Johnston Island. Reports of occurrence in other Indo-West Pacific countries are questionable.
Conservation status (IUCN)
Not Evaluated
Threat to humans
Harmless
Resilience
High, minimum population doubling time less than 15 months (tmax=0.3 (120 days))

Sources

Taxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.

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