keelges
Keelges are a fictional group of marine invertebrates described in speculative fiction and worldbuilding literature. They are defined by a pronounced keel-shaped ridge running along their carapace and a soft, bioluminescent underside. Adults typically measure 2 to 6 centimeters in length, though sizes vary with habitat and age. The shell is smooth with fine longitudinal ridges that converge at the keel, which may extend beyond the rear edge in some populations. In life, keelges display a slow, gliding motion but can propel quickly by flexing their keel.
Keelges inhabit shallow coastal zones, especially kelp forests and rocky reefs in temperate seas. They are
Taxonomy is inconsistent across fictional works, with some portraying keelges as crustaceans, others as mollusks or
In culture, keelges can symbolize tides, endurance, or camouflage. They appear in folklore as luminous guides