fortune, luck - an unknown and unpredictable phenomenon that leads to a favorable outcome; "it was my good luck to be there"; "they say luck is a lady"; "it was as if fortune guided his hand"

serendipity - good luck in making unexpected and fortunate discoveries

barb - a subsidiary point facing opposite from the main point that makes an arrowhead or spear hard to remove

harpoon - a spear with a shaft and barbed point for throwing; used for catching large fish or whales; a strong line is attached to it

anchor, ground tackle - a mechanical device that prevents a vessel from moving

projection - any structure that branches out from a central support

cetacean, cetacean mammal, blower - large aquatic carnivorous mammal with fin-like forelimbs no hind limbs, including: whales; dolphins; porpoises; narwhals

tail - the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the body

flatworm, platyhelminth - parasitic or free-living worms having a flattened body

class Trematoda, Trematoda - parasitic flatworms (including flukes)

Fasciola hepatica, liver fluke - flatworm parasitic in liver and bile ducts of domestic animals and humans

Fasciolopsis buski - fluke that is parasitic on humans and swine; common in eastern Asia

blood fluke, schistosome - flatworms parasitic in the blood vessels of mammals