All articles starting with M

Marine mammal

Marine mammals: mammals (cetaceans, pinnipeds, sirenians, marine fissipeds) living mostly or entirely at sea, breathing air, nursing young, and diving on stored oxygen; protected in U.S. waters by the 1972 Marine Mammal Protection Act, with bycatch the leading human-caused threat.

Marine One

Marine One is the call sign for any US Marine Corps aircraft carrying the President, not a single aircraft; its helicopters are flown by squadron HMX-1 from Quantico, Virginia.

Marine outfall tunnels

A marine outfall tunnel is a sub-sea conduit carrying treated wastewater from a treatment plant beneath the seabed, releasing it far offshore through risers and multiport diffusers, as at Boston and Sydney.

Marine paint and antifouling coating

Marine paint and antifouling coating prevents algae, barnacles, and molluscs attaching to underwater hulls, where heavy biofouling can raise a vessel's fuel consumption by 40 percent.

Marine Park (Malaysia)

A Marine Park in Malaysia is a sea-zoned conservation area extending two nautical miles around gazetted islands, protecting coral reefs and marine life under the Fisheries Act 1985.

Marine Park (South Korea)

Marine Park (마린파크) is a dolphin-experience theme park in Hwasun-ri, Andeok-myeon, Seogwipo, Jeju, opened December 2010 and billed as Korea's first and only dolphin experience facility; the name also covers marine parks in Gimpo, Pohang, and Jinhae.

Marine pollution

Marine pollution: human-introduced contaminants harming the ocean, mostly from land (about 80 percent). Covers nutrients, plastics, chemicals, noise; regulated by the London Convention, MARPOL, UNCLOS, and a pending UN plastics treaty.

Sep 29, 2026

Marine predators algorithm

The marine predators algorithm (MPA) is a nature-inspired metaheuristic for numerical and engineering optimization, introduced by Afshin Faramarzi and colleagues in 2020, that models Lévy and Brownian foraging of ocean predators.

Marine propulsion

Marine propulsion, also known as ship propulsion, is the machinery and hydrodynamic system that generates thrust to move a ship, evolving from steam and sail to diesel-electric drives and now facing decarbonization.

Marine Raider Regiment

Marine Raider Regiment: MARSOC's regimental command of Marine Raiders, headquartered at Camp Lejeune, with three battalions, 12 companies, and 48 special operations teams for global special operations.

Marine Raiders

Marine Raiders: WWII USMC elite units (1942-1944), Commandos-inspired, four volunteer battalions, Makin raid, disbanded into the 4th Marines; name revived 2015 for MARSOC's Marine Raider Regiment.

Marine railway

A marine railway is a dry docking installation that hauls boats out of the water on a wheeled cradle for repair, known in Britain as a slipway.

Marine Rescue Coordination Centre

A marine rescue coordination center (MRCC), also called a maritime rescue coordination center, is a shore-based unit that coordinates maritime search and rescue operations within a defined region.

Marine Research Aquarium

Marine Research Aquarium: name shared by research aquarium facilities, notably ICAR-CMFRI aquaria at Calicut and Sagarika Vizhinjam in Kerala, the Sea Point aquarium in Cape Town, and the Australian Antarctic Division krill aquarium in Tasmania.

Oct 20, 2026

Marine reserve

Marine reserve, also called no-take marine protected area (MPA), is an ocean area where fishing and extraction are prohibited. Key facts: spillover benefits adjacent fisheries, about 10% global coverage by 2026, 30x30 target, BBNJ high seas framework.

Marine reserves of New Zealand

Marine reserves of New Zealand are no-take areas under the Marine Reserves Act 1971, the country's highest marine protection. 44 reserves cover 17,178 km² (9.5% of the territorial sea), mostly around the Kermadec and Subantarctic Islands; the first, Goat Island, dates to 1975.

Marine reservoir effect

The marine reservoir effect is the apparent extra age, typically about 400 years, of marine organisms in radiocarbon dating because oceans are depleted in carbon-14.

Marine shrimp farming

Marine shrimp farming, also called penaeid shrimp aquaculture, raises shrimp in coastal ponds and intensive land-based systems, supplying about 40% of world shrimp; defined by extensive, semi-intensive, and biosecure intensive production models.

Marine snow

Marine snow is the falling organic aggregates (over 0.5 mm) of phytoplankton, fecal pellets, and detritus that carry carbon from the ocean surface to the deep sea, feeding deep-sea animals and driving the biological carbon pump.

Marine steam engine

A marine steam engine is a heat engine that turns steam raised in a ship's boiler into propulsion, powering most merchant and naval ships from the mid-1800s until diesel took over.

Marine stratocumulus clouds

Marine stratocumulus clouds are low, layered clouds over the oceans that cover more of Earth's surface than any other cloud type and strongly reflect sunlight, making them a leading source of uncertainty in climate prediction.

Marine terrace

A marine terrace is a flat, step-like coastal landform formed as wave erosion and land uplift interact over hundreds of thousands of years, recording past sea levels and earthquakes.

Marine VHF radio

A marine VHF radio is a ship and shore radiotelephone in the 156 to 162 MHz band, the primary short-range voice and distress system on coastal waters.

Marine viruses

Marine viruses: viruses of the ocean, mostly phages, about 10 million per mL of surface seawater and 10^30 total. They kill ~20% of oceanic microbial biomass daily, drive the viral shunt and shuttle carbon pathways, and hold most marine genetic diversity.

Marine World Uminonakamichi

Marine World Uminonakamichi (マリンワールド海の中道) is an aquarium in Uminonakamichi Seaside Park, Fukuoka, Japan; opened 1989/1995, PFI-operated since 2016, with 20,000 creatures of 450 species and daily dolphin shows facing Hakata Bay.

Marineland of the Pacific

Marineland of the Pacific, also called Marineland Palos Verdes, was an oceanarium in Rancho Palos Verdes, California, open 1954 to 1987; the world's largest oceanarium at opening, designed by William Pereira, famous for orcas Orky and Corky, closed by Harcourt Brace Jovanovich, site now Terranea Resort.