r/SpeculativeEvolution • u/Wuna_uwu • 2d ago
Aquatic April Aquatic April Day 3: Star (Octococcis volida)
Day 3: Star
The Supernova Starfish (Octococcis volida) is a species of eight-armed starfish often found in rocky tide pools. They are omnivores, feeding on algae and kelp growing on rocks when no food is available, but hunting snails, barnacles, and other hard-shelled animals when they are around. Unlike most animals, these starfish are almost exclusively found in tide pools, as they find themselves highly susceptible to large aquatic predators, whereas on land they have fewer threats.
Their most striking feature is their tentacle-like appendages coming out of their center. These are sacs that, when the tide begins to lower, are filled with water. They act as an oxygen reserve, but also stand up straight, up to almost a meter tall, scaring away potential predators. This means that, even if the tides leave them with no water source, they can survive for around 4 hours out of water. By this point, they usually find a pool to shelter in, or the tide comes back in. When out of water, they move to areas of higher humidity , which they have adapted to sense. Their sacs also radiate heat effectively, protecting them from dissection and the hot, neotropical sun. The sight of dozens of Supernova Starfish laid out on the rocky beach, with their tentacles sticking up into the air with bright blues is often compared to witnessing an alien invasion.