| Family: |
Atherinidae (Silversides), subfamily: Craterocephalinae |
| Max. size: |
5.2 cm SL (male/unsexed) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
Oceania: Dalhousie Springs in Australia. |
| Diagnosis: |
Distinguished from other hardyheads by a combination of the following characters (expressed in mean): greatest body depth (mean 4.9), least body depth (mean 10.3) both in SL; eye 3.0 in head; midlateral scale count (mean 31.4). Osteologically diagnosed by the combination of the following: dentition, shape of urohyal, medial wing of pelvic bone and premaxilla. Differs further in lacking ventral processes on fifth ceratobranchial for attachment of pharyngoclavicularis internus muscle (Ref. 26685).
Description: first dorsal fin spines 6, 5-6; second dorsal fin Ii5, Ii5-6; anal fin Ii7, Ii6-7; pectoral fin Ii12, Ii10-13 (Ref. 26685). |
| Biology: |
Inhabits warm water (>20°C) of spring-fed pools. Upper temperature tolerance is probably not as high as C. dalhousiensis. Omnivorous. Only co-occurs with C. dalhousiensis in one spring (Ref. 44894). |
| IUCN Red List Status: |
Vulnerable (VU); Date assessed: 01 August 1996 (D2) Ref. (130435)
|
| Threat to humans: |
harmless |
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