All articles starting with S
44,216 articles
Sea anemone
Sea anemone (order Actiniaria): predatory, skeleton-less cnidarian polyps, about 1,200 species in suborders Anenthemonae and Enthemonae, found at all ocean depths, armed with nematocyst venom and famous for anemonefish symbioses.
Sea anemone neurotoxin
Sea anemone neurotoxins are cysteine-rich peptide toxins from Actiniaria sea anemones that block or modulate NaV, KV, ASIC, and TRP ion channels; nine structural folds, 12 pharmacological families, and drug leads such as ShK/dalazatide.
Sea anemone toxin
Sea anemone toxin is the venom of sea anemones, mainly proteins and peptides that act on ion channels to immobilize prey; most species pose no human threat.
Sea angel
Sea angels (Gymnosomata) are shell-less, holoplanktonic predatory sea slugs, relatives of sea butterflies. They swim with wing-like parapodia, prey almost exclusively on thecosome pteropods, and number 43 extant species, most abundant at high latitudes.
Sea apple
Sea apple (Pseudocolochirus violaceus, 紫偽翼手參) is a colorful Indo-Pacific sea cucumber of family Cucumariidae, 10–18 cm, a filter feeder with branched tentacles that releases lethal toxins when stressed in aquaria.
Sea Baby (Морський малюк)
Sea Baby (Морський малюк) is a Ukrainian unmanned surface vehicle packed with explosives, operated by the Security Service of Ukraine and known for striking the Kerch Bridge in 2023.
Sea bass
Sea bass is a common name for several marine food fish, chiefly the European seabass (Dicentrarchus labrax), plus black sea bass, barramundi, and Japanese sea bass; euryhaline predators, farmed in Mediterranean sea cages and managed under size and bag limits.
Sea battles of Suppiluliuma II
The sea battles of Suppiluliuma II were three naval victories of the last Hittite king over the ships of Alašiya (Cyprus), recorded on tablet KBo 12.38.
Sea breeze
A sea breeze, also known as an onshore breeze, is a thermally driven daytime wind blowing from cool water onto warm land, often triggering coastal showers and thunderstorms.
Sea breeze front
A sea breeze front is the leading edge of a sea breeze, where cool marine air undercuts warmer land air, often bringing showers and a sharp temperature drop.
Sea Breeze Gardens
حدائق نسيم البحر (Hada'iq Nasim al-Bahr, Sea Breeze Gardens) is a family entertainment and gardens venue in Najaf old city, Iraq, overlooking the dry Najaf lake basin; a 7,500 m² landscape project built 2014–2016 for the Zamzam Tourism Group at a cost of 1 billion Iraqi dinars.
Sea butterfly
Sea butterflies (Thecosomata) are small pelagic swimming sea snails, pteropods whose foot forms swimming parapodia and who carry thin aragonite shells, feed with mucus webs, and serve as sentinels of ocean acidification, distinct from shell-less sea angels.
Sea captain
A sea captain, formally the master of the ship, is the person in overall command of a merchant vessel, responsible for its safe operation, crew, passengers, and cargo.
Sea cave
Sea cave (littoral cave): a hollow eroded in a coastal cliff by wave attack along faults, joints, or soft layers; part of the cave-arch-stack erosion sequence, distinct from dissolutional flank margin caves.
Sea caves of the Na Pali Coast
The sea caves of the Na Pali Coast are wave-cut caverns and collapsed lava tubes in Kauai's basalt cliffs, Hawaii, including Waiahuakua and the Open Ceiling Cave.
Sea Change (album)
Sea Change (2002) is Beck's melancholy acoustic breakup album on Geffen, produced by Nigel Godrich at Ocean Way Studios, with strings by David Campbell; precursor to Morning Phase.
Sea clutter
Sea clutter is the unwanted radar echo returned from the sea surface, scattered by waves, ripples, and spray, that makes detecting ships and small boats harder for maritime radar.
Sea cucumber
Sea cucumber (Holothuroidea): echinoderm class of seabed deposit feeders that recycle nutrients through bioturbation. Fished as beche-de-mer for Asian markets; overfishing has depleted 81% of fisheries.
Sea cucumber conservation and fishery management
Sea cucumber conservation and fishery management addresses overexploitation of sea cucumbers harvested for the dried Asian food trade, where high prices have driven depletion and fishery closures.
Sea cucumbers as food
Sea cucumbers as food: echinoderms eaten as dried body wall, bêche-de-mer or trepang; 245,000 t produced in 2020, China takes 82.3% of imports, over 60 species fished by 40+ countries, overexploited.
Sea Dart
Sea Dart (GWS-30) is a British naval surface-to-air missile system developed by Hawker Siddeley Dynamics, carried on Royal Navy destroyers and carriers from 1973 to 2012, with kills in the Falklands War.
Sea Dragon (rocket)
Sea Dragon was a 1962 design study by Robert Truax at Aerojet-General, under NASA contract, for a two-stage, sea-launched super heavy-lift rocket; it was never built.
Sea eagle
Sea eagle, genus Haliaeetus (Savigny, 1809), a group of eight large fish-eating eagles including the bald eagle, white-tailed eagle, and Steller's sea eagle; broad-winged Accipitridae related to kites, not true eagles.
Sea foam
Sea foam, also called ocean foam, is a mass of air bubbles in seawater stabilized by organic molecules and whipped up by wind and breaking waves.
SEA Games
SEA Games (Southeast Asian Games), successor to the 1959 SEAP Games, is a biennial multi-sport event for 11 Southeast Asian nations run by the SEAGF; renamed in 1977, Timor-Leste joined in 2003, Thailand hosted the 33rd edition in 2025, Malaysia hosts 2027.
Sea glass
Sea glass, also known as beach glass, is discarded bottle and tableware glass weathered in oceans, lakes, or rivers until its edges are rounded and its surface frosted.
Sea goat
The sea goat is a mythological hybrid creature with the head and forequarters of a goat and the body and tail of a fish, embodied in the zodiacal constellation Capricornus.
Sea Hawk (USV)
Sea Hawk is a U.S. Navy medium displacement unmanned surface vessel built by Leidos and delivered in April 2021 as a sister ship to Sea Hunter.
Sea Hunt
Created and produced by Ivan Tors, Sea Hunt is an action-adventure series that aired from 1958 to 1961. Starring Lloyd Bridges, it popularized underwater adventures and helped spread scuba diving.
Sea Hunter
Sea Hunter is a 132-foot (40-meter) unmanned trimaran developed for DARPA's anti-submarine warfare program, launched in 2016 and now the US Navy's testbed for medium unmanned surface vessels.