Evolution attempts: Basic brain-1 Fins-6 Eyes-2
(normally a one would result in backwards evolution but since this creature is already so dumb I'm giving you guys a break this time)
Suprafloorum quickfin is such a giant leap past Seafloorum thornum that is has joined a different phylum in classification. It has 4 sets of powerful fins which allow it to move quickly through the water. Unfortunately as it doesn't have many senses, it tends to bump into things frequently, but its light spots and lateral lines help prevent it from getting into most bad scenarios.
Competition is beginning to grow stronger. Quickfins tend to take a more Tentahook like approach now, but with it's tentacles floating upwards instead of downwards as it swims, which snags more Tentahooks and Quadfins than anything else, but they are completely uncompeted for light in photosynthesis now.
The Tentahooks however are beginning to develop senses as well as an immunity to our toxins. They've developed lightspots more advanced than ours, but not by much. It has increased their predatory stance, however. They still lack a lateral line, however, and our lines allow us to avoid them. When it comes to a combat between the two creatures, Tentahooks usually win.
GENERATION 5:
(Suprafloorum) quickfin
A clear, tentacled jelly blob. They absorb food through the skin, and is dissolved in the inner body fluids. It is around 20 centimeters in height, 15 centimeters long and 5 centimeters wide. They have 7 tentacles, and each tentacle absorbs light in photosynthesis, but are also laced with a decent toxin which paralyzes anything which comes in contact with it.
SOCIAL: Completely socially awkward detached.
SENSES: Can detect electrical signals in the water, but only powerful ones. Faint ones are almost always ingnored. Light can also be detected, as well as shapes, but colors and others are not noticeable yet.
REPRODUCTION: Budding. The buds detach after reaching about 3 millimeters in dimensions and then float to a short distance away before growing into their own blob. About three buds grow at a time, and the time for each bud to grow to the point of detachment is about one day.
MOVEMENT: Is currently the fastest known creature in the environment. Its fins allow it to propel itself very quickly to wherever it goes.
EATING: It absorbs cells floating through the water. It will also prey upon the corpses of dead blobs. Its tentacles can create sugars from light with photosynthesis. The toxins which the tentacles carry can potentially kill other creatures, usually does not though, exceptions are those who are weak or young. Paralyzed but living creatures fall down to the blob's main body where endocytosis then takes place.
PREDATION: Tentaclaws are developing a toxin immunity, and because of this are able to prey on us more and more frequently. They are not entirely immune, and consuming a Quickfin tends to leave one immobilized for up to a day in extreme cases. Sometimes the Tentaclaws die, but rarely.
COMPETITION: They are uncompeted.
INTELLIGENCE: No form of intelligence. At all.
TOXINS: Neurotoxin- affects Tentaclaws (60% effectiveness) and Quadfins (100% effectiveness)
ENVIRONMENT: A shallow sub-tropical sea. Small reefs exist here, with a rare frond interspersed between the reef ridges. Much of the reef is dark, overshadowed by the growing populations above. The environment is at around 50% of its biomass capacity.
Current environment: Shallow sub-tropical sea.
Nearby environments: Beach, deeper sub-tropical sea, river delta