Ribblehead has numerous small seas covering less than half of the surface
These worlds are Gaian in nature with a percentage of open water less than half the planetary surface. As such, the climates of these planets are quite dry, with desert zones covering most of the inland regions, and over all rainfall relatively low even in the polar or tropical latitudes. They may hold diverse biomes which are adapted to conditions with relatively low rainfall.
The surface oceans, better characterized as landlocked seas, have a high salinity, and may sport biomes highly adapted to such conditions. Indeed, a sudden influx of less saline water has been known to cause marine mass extinctions.