Latin name: "lobsturgeonus ridiculux"

A bizarre genealogical cross between the common lobster and the sturgeon. Experts have speculated that the cross-breeding occurred during the ice age, when various species found it difficult to identify their own. A similar example being the polar bear; a cross-breed between the brown bear and an iceberg that ocurred in the same period.
The eggs of lobsturgeon may be edible, like that of more common sturgae, but on occasion these eggs can hatch inside a human body and cause innumerable sores of the stomach lining due to the constant pressure from tiny pincers.

Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.