General
Glesvaerids are mysterious creatures of the deep, seldom seen but relatively common a few hundred meters below the surface. They prefer open-ocean environments and can be found worldwide, from the shores of Callisto to the cold north waters of the Arkene and Boreus. Glesvaerids are difficult to catch, not only because of their remote choice of habitat and the pied patterning that makes them difficult to spot when they do visit the surface, but also because of their ability to teleport at will. If sufficiently disturbed, a regal glesvaerid will wriggle its body, producing a blue glowing near its facial fins which will then become a portal the fish can swim through to escape. Once the fish is gone, the portal disappears. These portals can open up anywhere in the world as long as there is sufficient salt water, and many magi think the fish's teleportation is how it maintains such a large range, as the individual fish seldom ever swim far on their own.
Egg
This egg is blotched with patches of white and blue. It has two massive ray-like fins emerging from the shell.
Hatchling
Your strange egg has hatched into an equally unusual fish. The fry is only a few inches long, but built to be long and spindly like a snake. It usually swims by rippling the fins on its back and tail, maintaining a stable posture in the water so that it can feed on small particles of plants and animals that float by. Its still posture, thin form, and blotched coloration ensure that the fish is invisible to most would-be predators, but if a curious rewin dragon or pearl wyrm wanders too close, your fish will wriggle its way to safety, teleporting itself into a clump of seaweed or coral until it is safe to emerge.
Adult
Regal glesvaerids take decades to reach their full size and are rarely seen by humans. However, once fully-grown, they can easily be mistaken for small leviathans and other sea monsters at a glance. Glesvaerids are among the longest fishes in the world, easily growing thirty feet long or more, though they weigh much less than other large fishes because of their serpentine shape. No one is quite sure why they grow so long, as they generally feed by swimming vertically in moderately deep water and waiting for small creatures to pass, but their length helps them greatly should they want to move fast. Because they move their entire long bodies when they are preparing to teleport, it is possible that the length of the fish helps them to use their magic by somehow concentrating it into a thin portal just barely large enough for the fish to pass through.
Notes
Obtained from: Shop, Water Shop: 3600 gold
Breeding: Yes
Renaming cost: 200 gold
Release date: February 27th 2018
Element: Void 
Breeds with the following:
Regal Glesvaerid + Regal Glesvaerid = Regal Glesvaerid (Normal)
Sprite art: Tekla | Description: PKGriffin