Sicydium altum Meek, 1907
photo by Molina, A.

Family:  Gobiidae (Gobies), subfamily: Sicydiinae
Max. size:  14 cm SL (male/unsexed)
Environment:  demersal; freshwater
Distribution:  Central America: Atlantic drainage of Costa Rica. Probably occurring in neighboring countries.
Diagnosis:  Remarks: caudal fin rounded.
Biology:  Found stuck to rocks or hiding between stones in creeks and rivers. Usually in rapids and riffles of high current velocity, up to an elevation of 1, 180 m. Ingests mud, diatoms and filamentous algae scraped from the substratum. Gravid females at 7 cm SL have been observed.
IUCN Red List Status: Vulnerable (VU); Date assessed: 28 February 2020 (B1ab(iii,v)) Ref. (126983)
Threat to humans:  harmless

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