Tube-Raider Pulmoninno
When zone 15 ecosystems collapsed, Respirare simplex suffered as their food source, Multis parva became extremely rare and isolated. Thy survived by feeding on detritus or carrion, some individuals began to turn their attention to Neritina tigerensis populations. By predating these Ossurans, populations of R. simplex survived. Overtime, the surviving populations of N. tigerensis evolved into a distinct species, which then spurred the surviving R. simplex to adapt and speciate as well.
10 centimeters long
The Tube-Raider Pulmoninnow (R. deminutivus) is a small member of Pulmonichthyes. The Tube-Raider Pulmoninnow does retain several traits, like the presence of the labyrinth organ, which allows them to breathe air as well as getting oxygen from their gills. This is useful in shallow, slow-moving streams where water can be poorly oxygenated. While they can live in these areas feeding on detritus and carrion, they prefer to live near the mucus tubes of the Tube Snailer (Neritina mucophilus) since these are their primary food source. Since it often has to be in waters with a stronger current, the Tube-Raider Pulmoninnow has developed larger fins to better help it swim and remain upright. Most fins are proportionally large, but the caudal fin has also become less tapered at their end while the ventral fin is much more angled. Its ability to alter the color of their scales helps it camouflage from both predators and prey. When it is not actively trying to blend in with a certain environment, the Tube-Raider Plumoninnow is a darkish brown in coloration.
The Tube-Raider Pulmoninnow waits near the mucus tubes of Tube Snailers, watching the entrances for individuals to leave the tubes. Once the Tube-Raider Pulmoninnow spots a target, which is why the eyes have become much larger and are better able to focus, the Pulmonichthyian will lunge forward and shoot their jaws out to engulf the Ossuran. Since the Tube Snailers are so small, the Tube-Raider Pulmoninnow shrank in size so its energy requirements were lower. This did mean the Tube-Raider Pulmoninnow have to hide from species like the Emerald Crablet (Multis diegoii).
To keep up with predation rates, the Tube-Raider Pulmoninnow lays large amounts of eggs, about 100 hundred at a time, within large clumps of foliage like the various species of Eodaceans native to the river system.