Wiktionary
n. (taxlink Riftia pachyptila species noshow=1), a large marine invertebrate found around the floor of the Pacific Ocean.
Wikipedia
Giant tube worms, Riftia pachyptila, are marine invertebrates in the phylum Annelida (formerly grouped in phylum Pogonophora and Vestimentifera) related to tube worms commonly found in the intertidal and pelagic zones. Riftia pachyptila live over a mile deep, and up to several miles deep, on the floor of the Pacific Ocean near black smokers, and can tolerate extremely high hydrogen sulfide levels. These worms can reach a length of and their tubular bodies have a diameter of . Ambient temperature in their natural environment ranges from 2 to 30 degrees Celsius.
The common name "giant tube worm" is however also applied to the largest living species of shipworm, Kuphus polythalamia, which despite the name "worm" is a bivalve mollusc, rather than an annelid.
Usage examples of "giant tube worm".
Just when she thought she would never find the little one, she saw it, its back closer to the reef than she had thought, trapped in the waving tentacles of a giant tube worm.