"Gonionemus vertens " has in addition been reported to be very venomous in waters near Japan and Russia.
2.
""'Gonionemus " "'is a genus of hydrozoans that uses adhesive discs near the middle of each tentacle to attach to limnomedusan inhabits quiet waters of northern Japan and Kamchatka ( Russia ), and the area from Alaska's Aleutian Islands to northern California.
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