These creatures are so prevalent that they can be found in oceans worldwide, though many are known to migrate, or vary slightly from place to place.
Sea Orm, Jormungandr. The largest of all eels and one of the most notorious of sea serpents, it lives mainly in the depths and feeds on large fish and squid. When encountered on the surface or caught in nets, it will cause considerable commotion. 25 meters long, 70 tons. Congridae.
Serra, a very large and ferocious fish resembling the wahoo and Spanish mackerel. 4 meters long, 150 kilograms. Scombridae.
Lyngbakur, the largest and most legendary of the baleen whales, found in many places, though it is most notorious in the north. 27 meters long and 210 tons. Balaenopteridae.
Bosch, this hand-sized leathery mollusc has attracted many myths of ill omen among pirates and sailors. Commonly attaches itself to ships and stows away in bilge water. 22cm long. Acanthochitonidae.
Megalodon, this ferocious giant shark is legendary in its depredations on whales and sometimes even small ships. 20 meters long, 110 tons. Genus Carcharocles.
Leviathan or Tiamat, a huge sea dragon which commonly preys on whales and sailors. 20 meters long, 90 tons. Tylosaurinae.
Kraken or Supergiant Squid, one of the most legendary of all sea monsters, it is able to prey on sharks, whales and sailors alike. Will attack ships. 46 meters long 230 tons. Cranchiidae.
Triton, Merrow or Merfolk. These deceitful creatures are a kind of primate, though resemblance to humans is exaggerated. 1.6 meters long, 80 kilograms. Cercopithecoidea.
Morgawr or Longneck, shy by nature and seldom seen, they cast a distinctive profile when spy hopping, something like a periscope. Generally afraid of ships, prefers calm weather. 10 meters long, 3 tons. Plesiosauria.
Aspidochelone or Father of all the Turtles. This ocean wanderer is large enough so that its dried shell may be used to make a hut, when seen they are plainly visible on the surface of the ocean. 8 meters carapace length, 3.2 tons. Protostegidae.
Murex, these shellfish wander the open ocean, afloat in the water column and undulating their “foot”. 1 meter long, 7 kilograms. Littorinimorpha.
Many-Humped Serpent, Scoliophis, Great Sea Serpent. These large archaic whales bear a series of humps down their back, which makes a distinct profile. 25 meters long 110 tons. Basilosauridae.
Trolual, Devil-whale, Nauthveli. This variety of sperm-whale is large and pugnacious, and will sometimes attack ships. 20 meters long, 120 tons. Physeteridae.
Ziphius, this deep-water hunter has large eyes and does not make sonar calls; it preys mainly on squid of the abyss but will sometimes attack surface-dwelling prey. 13 meters long, 14 tons. Mammalodontidae.