States/Provinces Summary
Hydractinia californica  in California, USA
Main ref. (120785). Stampar, S.N., V.B. Tronolone and A.C. Morandini, 2006. Description and life cycle of the hydrozoan Hydractinia uniformis, sp. nov. (Cnidaria: Hydrozoa: Hydractiniidae), from the coast of southeastern Brazil. Zootaxa 1200:43-59. 
Status: native 
Abundance:  
Comments: Known from San Diego (Ref. 120785). 
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