Those Familiar Shoals Rippling Past the Surface

Those Familiar Shoals Rippling Past the Surface is the homeworld of the Myphym and the fourth planet from the sun. Formerly known as TRAPPIST-1d, the Shoals (as it is colloquially known) is entirely covered in water, with long stretches of shallow sea and extreme tidal variation. It is locked in a spin-orbit resonance with its sun, creating strong winds and high temperature variation. It is far less biologically diverse than Earth, possibly owing to its comparatively volatile climate; most species live deep under the ocean, while thick, algae-like plant analogues and coral reef-like structures coat the rocks of the shallow seas. The Myphym evolved to adapt their bodies to constantly-changing tidal conditions, and are extremely temperature-resilient as a result of the volatile oceanic currents and temperatures to which they have been subjected.