Symboather

The most amazing advancement on the symboather is it's perfect symbiosis with the megaorthoceros segnoneustes. In return for protection, and a cut of the energy acquired from photosynthesis, the megaorthoceros provide nutrients from either chemosynthesis and absorption of any decaying material floating around. There are more males then female, because females have less use for their detrivorenism, and due to the original male/female ratio. This has aided the symboather to grow larger, finally coming over the 1 cm mark.

The megaorthoceros are connected to the strings, made out of the same cells as the arms, floating below the symboather. The strings are covered with megaorthoceros, but because they replace the cells usually used for expanding or retreating the flexible part, this makes the strings less effective at pulling back the strings as it is for retreating the arms. Megaorthoceros fully covering the strings is more useful then making patches of them, this way, if decaying material is near, the female megaorthoceros have more chance at picking that material up.

Another evolution is the gaining of another arm, and the slight changing of the photosynthesing plateaus. They have become fully round and do not click perfectly together. Instead of that, it leaves open tiny holes, out of which the tentacles can dangle. However when it senses danger of any kind, or just feel like it, it can simply pull in the tentacles just like it can pull in the arms.

The symboather has not replaced its two ancestors due to massive amounts of space.