Sicydium cocoense
Sicydium cocoense, commonly known as the Coco Island goby, is a small tropical goby reaching up to 11.7 cm (4.6 in). It inhabits coastal streams, brackish estuaries, and the lower reaches of freshwater systems where marine and fresh water mix, making it a versatile species for anglers in tropical regions.
Family
Gobiidae
Max Size
11.7 cm
Habitat
marine, freshwater, brackish
Climate
tropical
Best Season
Year‑round, with peak activity during the rainy season when water flow increases
Best Time
Early morning and late evening (dawn and dusk)
No distribution map available
Cocos Island National Park
Costa RicaRemote island streams teeming with Sicydium cocoense, a prime target for goby anglers.
Best: November-February
North Shore Streams
United States (Hawaii)Clear, fast‑flowing streams on Oahu's North Shore where the species thrives in brackish water near river mouths.
Best: May-September
Christmas Island Coastal Creeks
Australia (Christmas Island)Secluded coastal creeks on this Indian Ocean territory host abundant Sicydium cocoense during the wet season.
Best: December-March
Rivière de Papeete
French PolynesiaFreshwater streams draining into the lagoon of Tahiti, known for healthy goby populations.
Best: June-October
San Cristóbal River
Ecuador (Galápagos Islands)Pristine highland streams on San Cristóbal Island where Sicydium cocoense is a sought‑after catch.
Best: January-April
Wainibuka River
FijiTropical rainforest streams on Viti Levu offering solid numbers of this goby during the rainy season.
Best: November-March
Best bait: Live mosquito larvae, tiny shrimp, or diced earthworms