When mating, these magnificent creatures use their many chromatophores to make beautiful patterns on their skin to attract each other. Both sexes can do it. The hermaphrodite sex develops a long, fleshy organ to place the gametes into the pouch of the carrier. In order to control the population, the babies hatch inside the womb in a large amniotic sac. The fetuses swim freely, and are not attached to an umbilicus. They can breathe through their skin. An organ analogous to the placenta surrounds the amniotic sac and pumps in oxygen and salt into the fluid. The stronger fetuses eats the other, weaker fetuses. Only two of them survive, and they tend to be the strongest. This is called intrauterine cannibalism. At birth, the surviving babies quickly swim up to the surface to get their first breath and fill their gas-bladders.
The rainbow kraken has replaced the strainbean eater. It has grown to an enormous size. It's actual body is 22 meters long, but the two tentacles next to the mouth grew up to an enormous length. Mini-hearts develop in the tentacles to get blood flowing in them. The rainbow kraken can blend in with the water like its ancestor to catch unsuspecting strainbeans and giant shovelheads. The two long tentacles float around and act as touch receptors. They often float horizontally from the body due to pressure. When it has touched a prey item, the catching tentacle quickly wraps around the unfortunate strainbean or shovelheads and bring them back to the mouth. The rainbow krakens long tentacles have a thick layer of blubber to act as rubber in order to be protected from an electrical shock. Then the prey is injected with toxin and then killed. Also like the strainbean eater, the rainbow kraken can save meals for later consumption. In order to improve sight, a lens develops in the eye for greater directionality as well as the development of a cornea and humor in the retina to protect the eye from damage. However, it is not limited to the photosynthetic shovelheads. The rainbow kraken has the ability to deflate its gas bladder and sink deeper. The two nostrils close, and the newly improved lungs can hold breath for as long as 30 minutes. When submerged into the twilight zone it has the option to munch on dark giant shovelheads.