Scientific Name
Archamia biguttata

Common Name
Twinspot cardinalfish

Biology
Dorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 16 - 17. Diagnosis: Dorsal rays VII,9; anal rays 11,14-19 (usually 16-18); pectoral rays 14 (rarely 13 or 15). Lateral-line scales 25 + 3-5. Median predorsal scales 5-6 (usually 6). Gill rakers 5-7 + 15-18 (total, 20-24). Body depth 2.3-2.85 in SL, and body width 2.3-2.7 in the depth; eye diameter 2.7-3.1 in head length; first dorsal spine 2.0-2.9 in second spine; second dorsal spine 2.1-2.6, and third dorsal spine 2.2-2.7 in head length; spine of second dorsal fin 2.3-2.6, and second anal spine 2.5-2.9 in head length; pelvic-fin length 4.3-5.3, and caudal-peduncle length 4.9-5.9 in SL. Distance from insertion of pelvic spine to anal-fin origin 4.2-5.5 in SL. Posterior preopercular edge fully serrate or nearly so; serrae on upper part usually minute, rarely absent; ventral preopercular edge serrate on posterior two-thirds. Scaly sheath along anal-fin base well developed (Ref. 543

Classification

Classified By

Lachner, 1951

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Cardinalfishes (Apogonidae)

Distribution

Region

Western Pacific

Distribution

Western Pacific: Sumatra to Samoa, north to the Ryukyu Islands; Palau and Mariana Islands in Micronesia.

Range

30°N - 15°S

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

33 m

Zone

reef-associated

Environment

Marine; reef-associated; depth range 0 - 33 m (Ref. 54391), usually 0 - 15 m (Ref. 54391)

Trophic Level

3.56 s.e. 0.53 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

True

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

11.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5001 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Low vulnerability (11 of 100)

Resilience

High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated