In early June researchers from MBARI and the Monterey Bay National Marine Sanctuary traveled to Sur Ridge to study the corals and sponges that grow on this fascinating underwater mountain.

This unusual hydrothermal vent is one of many discoveries from a Gulf of California expedition highlighted in the 2015 Annual Report. The publication also features several science and engineering projects conducted close to home in Monterey Bay and includes a preview of some of the institute's emerging technologies.

The smallest member of the MBARI seagoing fleet, the R/V Paragon, often runs multiple missions in a day.

Some sea cucumbers may experience huge population booms following deep-sea “feasts.”

The deep sea is full of strange and little-known worms. A new paper coauthored by MBARI molecular biologist Robert Vrijenhoek describes four newly named species of worms in the genus Xenoturbella that have mouths, but no eyes, brains, stomachs, or anuses.

Underwater avalanches and turbidity currents carry huge amounts of sediment, organic material, and pollutants down submarine canyons and into the deep sea. Yet geologists know very little about how sediment moves during these events.

Submarine canyons are notoriously difficult to study because underwater avalanches periodically surge down the bottoms of many canyons, often burying or destroying scientific instruments.

Submarine canyons are notoriously difficult to study because underwater avalanches periodically surge down the bottoms of many canyons, often burying or destroying scientific instruments. After more than a decade of placing (and sometimes losing) equipment in Monterey Canyon, MBARI researchers have created a unique new tool to study canyon processes.

An amazing variety of bristle worms thrive in the ocean, both on the seafloor and up in the water column. Here are some examples of the bizarre and wonderful polychaetes that MBARI researchers have seen in the ocean depths.

For the second year in a row, MBARI has partnered with the Monterey Bay Aquarium, Science Friday, the American Museum of Natural History, and other groups to present a wonderful array of cephalopod images and videos as part of "Cephalopod Week."

In May 2015, as part of a large-scale experiment, ocean researchers measured some of the highest concentrations of harmful algae and their toxin ever observed in Monterey Bay.

May 11, 2015 - How can you track changes in complex marine ecosystems over time? MBARI scientists are part of a team trying to do just this with a five-year, $7 million grant through the National Ocean Partnership Program.

Female squid, octopuses, and cuttlefish end life with a bang. Usually, these soft-bodied cephalopods die after a single, end-of-life reproductive blaze of glory. But scientists have recently learned that one deep-red, foot-long cephalopod breaks this deadly pattern.

In early January 2015, a team of MBARI engineers, led by Andy Hamilton, set out to sea to recover an experimental buoy that creates electrical energy from ocean waves. This power buoy had been deployed six miles southwest of Moss Landing Harbor for 131 days, while engineers tested the system’s ability to handle storms.

In the deep waters of the ocean, there are no places to hide. To avoid predators, many deep-sea animals have dark-colored, reflective, or transparent bodies. Others have evolved elaborate methods of deception.

Sept 15, 2014 – Ocean researchers are on the verge of gaining new insights about the changing Southern Ocean with help from sensors developed by a research team at the Monterey Bay Aquarium Research Institute (MBARI).

Cephalopods—squids, octopuses, and their relatives—are some of the most beautiful and intriguing animals in the ocean. During the week of June 23-27, 2014, MBARI, the Monterey Bay Aquarium, and Science Friday teamed up to present a wonderful array of videos and still images of these creatures.

In the 100 years since marine biologists hauled the first vampire squid up from the depths of the sea, perhaps a dozen scientific papers have been published on this mysterious animal, but no one has been able to figure out exactly what it eats. A new paper by MBARI Postdoctoral Fellow Henk-Jan Hoving and Senior Scientist Bruce Robison shows for the first time that the vampire squid uses two thread-like filaments to capture bits of organic debris that sink down from the ocean surface into the deep sea.

In a recent paper, MBARI researcher Lonny Lundsten and his coauthors describe the first observations of these rare fish in their natural, deep-sea habitat.

  Axial Seamount, 480 kilometers (300 miles) off the coast of northern Oregon, is one of the best-studied underwater volcanoes in the world. For 30 years, researchers have explored this volcano using submersibles and monitored its activity using pressure sensors, tilt meters, temperature probes, and seismometers (earthquake detectors). Now MBARI researchers have created the world’s …