An exotic animal species. Noted for its bioluminescence and the sweet and fruity taste of its “meat.” They don’t respond well to captivity, but are docile enough that they can be raised in large enclosures. They are not afraid of people. Radiant triangles are 2-dimensional and grow as long as they live. Most individuals die young, but individuals that survive for 1 year are typically able to survive indefinitely. Individuals younger than a year, making up more than 98% of the radiant triangle population, resemble fireflies in size and behavior (coming out at night, blinking, and whatnot).