Much like the sharks of Earth, the coeaaien of Eryobis are subject to rather simplistic names. A prime example of this is the palefin coeaai (Psittacopristis pterochrio), a species of plated coeaai (order Laminocoeaiida) that inhabits the shallow waters along the northern and western coasts of Bloëcan Miesjeta.
As is typical for coeaaien, this species also has two large pectoral fins that are permanently oriented upward to function as dual dorsal fins. While these are mostly fixed, they do possess a small degree of mobility and allow coeaaien, such as this species, a surprising amount of maneuverability and makes them able to turn on a dime. Usually slow cruisers, coeaaien can perform quick bursts of speed to catch their prey and their maneuverability and flexibility allows them to strike fast in many directions around them.
A medium sized species with an overblown ego, palefins are known to be very inquisitive and border on aggression with their tendency to bite and nip things to investigate them. Chain mail is therefore a must for divers.
While they are generally known to feed mostly on small fish and nienktvissen, their plate-like fused teeth are self sharpening and extremely durable, which also allows them to feed on tougher prey such as pectinauts.
In addition, palefin coeaaien have been reported as avid scavengers that seem to get attracted to spilled blood in a fashion often described to sharks.
Being far from the largest coeaai species that lives around the Bloëcan coasts, they often congregate in groups of up to 30 individuals as protection. This however, also contributes to their perceived aggressive behavior, as they need to be quick and fierce in order to secure food for themselves.
Like many other members of the Laminocoeaiida, they possess a sharp spine in front of their true dorsal fin. Curiously, this spine seems to have evolved and been modified from the "spines" already present in the original first dorsal fin of the ancestral coelacanths.
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