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Halflings - 100MY

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Description

While some instances of neoteny have already happened by this point in Reccembra's history, none has been as pronounced and strange as the case of the halflings.

Descended from early maraca worms but looking completely different, halflings are a weird sight to behold, and will rise to become very important later as one of the first actively swimming clades of the planet.

Halfings came to be from an ancestor which, instead of completing its development into a maraca worm, stayed in an embryo stage, with its digestive surface exposed to the water and with no 'outer skin'. This eextremely neotenic lifeform then proceded to father a number of clades, three of which I'll discuss here.

H-fins:

H-fins are one of the weirdest, although not the most different, of the halflings. Their body is made out of two muscular cyllinders covered in cetae which they use to capture food. Evolved from their ancestor's 'open digestive cavity', these 'fins' can secrete digestive enzymes to dissolve anything that lands on them, absorbing it afterwards. Their cetae are also covered in a sticky substance to prevent food items from floating away once captured.

Between there fins is the creature's brain. It is usually in the middle of the creature, lending their name from their resemblance to the letter H, and is covered in a hardened skin shell.

Pappusiformes:

With an equaly weird bodyplan, pappusiformes are the cloest relatives to the H-fins. Instead of cyllindrical 'fins', papussiformes have adapted their digestive surface into a structure composed of delicate fibers arranged in a circular patter, resembling the pappus of dandelion seeds. They have evolbed these structures to aid in catching small ball grass that floats around them, as they are filter-feeders.

Jellimps:

The jellimps are the weirdest and largest of the halflings. Their weird anatomy comes from the fact that, instead of being one organism, they are actually only half. While in development, the jellimp has two 'heads' connected by what in other species is the brain container, but these two heads eventually separate into different organisms, usually both of the same sex. Once separated, the jellimps grow into their adult form, resembling an Earth jellyfish with a small protrusion on their underside: their feeding surface.

They are the only halfling clade considered nekton, and, although they are still small (50-200 mm in height), they have quickly risen to the top of the food chain, and are a worthy foe for even the most hardy of plankton.

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wayoutdan's avatar

What happens to the brain of the jellimps? Does each half grow into a full brain, or is it destroyed, or what?