Ok great. I went ahead and developed a creature last night.

Pockmarlotis-
1. Hard heavy knobby structure on the bottom capable of cracking off into clones of the original. This is the primary method of reproduction.
2. Photoreceptors on the top in thin hair like strands that drift in the currents. These are the primary source of energy for the creature.
3. Expanding balloon like membrane that controls buoyancy of the creature In order to enable changes in water depth. This is the primary means of mobility.
4. Main mouth in the bottom of the creature is used to draw in minerals for consumption.
5. Vents on the sides are used to draw in water for filling the bladder.
This creature will rise and fall within the water column dependent on sea conditions and its need for energy from sunlight. Also could possibly be able to control internal salinity levels as another method of buoyancy. In order to reproduce the creature smashes its bottom end against a hard surface to break off shards that contain genetic material capable of cloning the parent.
Alternative form of reproduction would involve the creature not breaking the hard seed pod until after it dies at which point it bloats and goes to the surface where it can be smashed against rocks in the surf. At which point the bottom seed pod breaks into small pieces that are clones of the parent.
Please pardon my art skills. They could use some work. This is your standard Microsoft Paint special.