From the post:
Not all of the Gibbering Hordes made their home in the oceans. There are a few species that moved into seaside caverns, though none quite as fully as the Yarazi. The Yarazi are much like puffins, flying high above the coastal waters before diving underwater for short periods to snatch up their prey. The Yarazi tend to use short bursts of speed when hunting rather than prolonged exertions, and they can reach incredible speeds while doing so. They're also capable of spitting an incredibly sticky mucus at great range, which is most often used to stop fleeing prey in its tracks. Despite their speed, Yarazi are not brave, and they will quickly flee from any real threats.