An AUV is an untethered underwater vehicle that can navigate and perform tasks autonomously, without human intervention.

The Challenger Deep, located in the Mariana Trench, is the deepest point in the ocean, with a depth of approximately 11,000 meters (36,000 feet).

Jellyfish are known for their bioluminescent abilities, using light production to attract prey, communicate with other jellyfish, and deter predators.

The Great Barrier Reef, located off the coast of Australia, is the largest coral reef system in the world, stretching over 2,300 kilometers (1,400 miles).

A CTD is a device used to measure the conductivity, temperature, and depth of seawater, providing valuable information about water properties and ocean circulation patterns.

The Deepsea Challenger Dive, conducted by filmmaker James Cameron in 2012, reached a depth of 10,908 meters (35,787 feet) in the Mariana Trench, marking the deepest manned dive in history.

R/V Atlantis, operated by the Woods Hole Oceanographic Institution, is a renowned research vessel that has conducted numerous deep-sea expeditions, including dives to the Mariana Trench.

A magnetometer is used in ocean exploration to measure the Earth's magnetic field, which can provide information about the structure of the seafloor and the presence of geological features.

A multibeam echosounder is a sonar system that emits a fan-shaped beam of sound waves to create detailed images of the seafloor, providing information about its topography and features.

The International Ocean Discovery Program (IODP) is a collaborative effort among scientists from around the world to explore and understand the history and evolution of the Earth's oceans and climate.

The electric eel, found in the Amazon and Orinoco River basins of South America, is known for its ability to generate powerful electric shocks, which it uses for hunting and defense.

Hydrography is the study of the physical and chemical properties of seawater, including its temperature, salinity, density, and circulation patterns.

A bathyscaphe is a deep-diving submersible designed to carry human explorers to the deepest parts of the ocean, typically reaching depths of several thousand meters.

Sonar (Sound Navigation and Ranging) is a technology that uses sound waves to create images of underwater objects and structures, allowing scientists and explorers to visualize the underwater environment.

Octopuses are known for their remarkable ability to change color and texture to blend in with their surroundings, providing them with camouflage and protection from predators.