Sealife guideThe giant tube wormRiftia pachyptila
Last updated on 04/20/2026 at 11:28 PM
The giant tube worm is a fascinating marine worm that lives in the extreme depths of the oceans, near hydrothermal vents. Discovered in the late 1970s, it has become a symbol of deep-sea ecosystems and life forms capable of surviving without sunlight.
Taxonomy
- Common name: Giant tube worm
- French name: Ver tubicole géant
- Scientific name: Riftia pachyptila (Jones, 1981)
- Family name: Siboglinidae
- Order name: Sabellida
- Class name: Polychaeta
Description
The giant tube worm can grow over 6.5 feet in length and lives inside a rigid white tube that it secretes. It has a bright red plume rich in hemoglobin, used to capture the gases necessary for its survival.
Geographic range
The giant tube worm is mainly found in the Pacific Ocean, along mid-ocean ridges, particularly near hydrothermal vents in the East Pacific. Its distribution is closely linked to these extreme environments.
Habitat
The giant tube worm lives at great depths, often between 6,500 and 9,800 feet, in close proximity to hydrothermal vents where water temperatures can reach very high levels. These environments are rich in chemicals but completely devoid of light.
Diet
Unlike most animals, the giant tube worm has neither a mouth nor a digestive system. It lives in symbiosis with bacteria that convert chemical compounds, such as hydrogen sulfide, into energy through chemosynthesis.
Reproduction
The giant tube worm reproduces by releasing its
gametes into the water, where fertilization is external. The larvae then drift in the ocean before settling near a hydrothermal vent and developing their bacterial symbiosis.
The marine species from eastern Pacific ocean
Bat sea star
(Patiria miniata)
Giant kelp
(Macrocystis pyrifera)
Gorgona guitarfish
(Pseudobatos prahli)
Leopard shark
(Triakis semifasciata)
Mosshead warbonnet
(Chirolophis nugator)
Red sea urchin
(Mesocentrotus franciscanus)
Sheep crab
(Loxorhynchus grandis)
Our latestUpdates
Thursday, May 7th 2026
Faroe islands
Discover the Faroe islands, a remote archipelago between Iceland and Norway known for its dramatic cliffs, colorful villages, and untouched Nordic landscapes. Find travel tips, itineraries, hiking guides, local culture, and inspiration to explore this unique destination in the North Atlantic.
Wednesday, May 6th 2026
The short-finned pilot whale
Discover the tropical pilot whale (Globicephala macrorhynchus), a highly social large cetacean from tropical and subtropical waters, specialized in deep dives in search of squid.
Thursday, April 23rd 2026
Where to see groupers in the Mediterranean ?
Discover where to see groupers in the Mediterranean: the best diving spots and protected marine areas to observe this iconic fish in its natural habitat.
Photo of the Day
Poisson papillon à demi masqué
(Chaetodon semilarvatus)
