Midwater ecology in west Pacific 

Pacific white-sided dolphin: These dolphins live along the western coast of North America, from Alaska to Baja California. They love to play in the wake of boats, and are known for their entertaining aerial acrobatics

Monterey Canyon.Sergestes similis swimming downward at 350 meters

Monterey Bay.Latitude 36o 42.1905 N Longitude 122o 2.9280 W. A deep-sea octopus, Graneledone boreopacifica, brooding her eggs on a vertical face of a large rock outcrop at 1,400 meters.Graneledone boreopacifica brooding eggs on an outcrop in Monterey Canyon

Monterey Bay.Histioteuthis heteropsis squid

Monterey Bay.Latitude 36o 41.8792 N Longitude 122o 2.9929 W. The jelly Atolla is a coronate with a long trailing tentacle in addition to many short tentacles

Tomopteris is a genus in which there are many species. This individual has a red gut, which may be due to its diet

2,300-meter site.Latitute: 36є 36.3159 N Longitude: 122є 9.5354 W The midwater octopod, Japetella

Chiasmodon niger can swallow prey similar to its own size.

The Pigbutt worm, Chaetopterus pugaporcinus is an unusual variation of a segmented polychaete worm

Oxygen minimum zone 1200 meters of Monterey Canyon. Latitute: 36 41.8792 N Longitude: 122 2.9929 W Vampyroteuthis infernalis

almost 3,000 meters deep. Nemerteans are neither worms nor fish, although they look a bit like both. They are unique enough to belong in their own phylum. Over the course of the dive we added two undescribed species of "spider", and a medusa in the genus, Chromatonema that weve only seen once before. The bathypelagic (deep open) ocean comprises a tremendously large habitat in the world ocean, extending from ~ 2,000 to 4,500 meter depths. Dr. Bruce Robison and the rest of us in the midwater lab are very interested in bathypelagic biodiversity and, while we learn a tremendous amount with each dive we make, we have only scratched the surface.

Munnopsid isopods arent spiders at all, but you can see how they got the name

the 1400 meter site in Monterey Canyon

the transects at 100 meters depth intervals between 200 m and 1000 m. Bolinopsis is a lobate ctenophore collected for Kims respirometry experiments

1200 meters. Octopoteuthis deletron has arm tips that can flash with light

Chiroteuthis calyx juveniles have a long, sword-like tail that is dropped as it matures. One aim in my research on the age and growth of midwater animals is to validate increment deposition in squid statoliths. Statoliths are aragonite structures in the cartilaginous brain of squid. They are small (1-2 mm, even in Architeuthis!) and they are even present in the squid when the squid is still inside the egg.

Galiteuthis phyllura has a clear body covered in chromatophores (pigmented organs) that can expand to make the squids body appear to go from clear to red

Small juvenile Octopoteuthis deletron

Although its hard to tell here, this was the largest Tomopteris

At 1800 m. Poeobius meseres is a suspension feeder

Pelagic-Benthic Coupling from 4000 meters deep


The depths of the Pacific Ocean off the California coast.- Dragon Fish (which we believe was Photostomias sp.)

2900 meters blow the surface. One animal we came upon was called a crinoid (also called "sea lilies") which is a type of enchinoderm

Phytoplankton (left to right) Dinophysis dinoflagellate, Cocolithophore, Chaetoceros centric diatom, Asterionella diatom. SEM images by Kurt Buck

Biogeochemical Cycles

the depths of the Pacific Ocean off the California coast. The organisms that we are most interested in collecting are ctenophores, siphonophores, radiolarians, cephalopods, and amphipods that live on gelatinous zooplankton





MBARI source
Climate and deep-sea communities
MBARI Projects

Хостинг от uCoz