triffid

1. (colloquial) Any of the sea anemones of the genus Aiptasia with poisonous tentacles, which are a pest in aquaria.Examples: "The plant is also very rare (related to triffids ... be wary) as it acts like a venus fly trap except it gives its catches to the fish, a truly symbiotic relationship"; "I too suffer from the dreaded Triffids !!! If you want a safer method of removal : I use boiling hot water and the syringe method."; "Ironically, these anemones are initially seen as a boon, the hobbyist having received "something for nothing" when the first few triffids appear in the nooks and crannies of the live rock."colloquial