Airbulbs

Breathing and Blood
Gelatin respiration is just like Earth's plants where they breathe in CO2 and breathe out oxygen.

Diet & Energy
All Gelatins are yellow because they absorb purple light.

Reproduction
Gelatins release large cells from its surface that clump together with their sister cells and those released from other gelatin. This mass forms something similar to the gelatins ancestor,the colonial crocusium, except it is very soft and easily torn apart, any pieces broken off during this stage simply turn into smaller masses. During this time the cells of the mass work together to grow their own glob, or piece of the mass, and build up a store of energy, when about two cm across they cells enter their second stage of development. In this stage they become hostile towards one another, the cells gathering together with others from the same ancestor cell. The separate clumps inside the mass grow at a cancerous rate, each glob trying to starve the other out or even consume the others into oblivion. During this time some cells might mutate and develop there own clumps, just prolonging the war. Once the war is over and only one clump remains it, settles, stocks up on oil, and begins transforming into the fully developed gelatin.