Pyramid Symboather

The pyramid symboather split from its ancestor and now only live close to the beach. This is to be able to use their new protection method. When they make their self heavier and sink towards the ground the pyramid symboather will form a pyramid with the pointy part downwards. When it reaches the sand it starts to carefully "flap" the fin like parts, digging itself into the ground. The strings that absorb energy from dead material still sticks up though because the "white cells" that can change density on the top of the strings works in a different way. When the main body of the pyramid symboather is at the minimum density the strings are at maximum density vice versa. The main energy source for the pyramid symboather is still photosynthesis though. Except for this and growing twice the size of its ancestor to be able to dig down into the sand easier the pyramid symboather works like its ancestor.