A somewhat vacuous-looking Astromon that does not, in fact, have much going on upstairs. The appendage on its head is sturdy can be used for self-defence. Gulps sometimes spew-inducing liquid, which they use to escape predators.
An evolved Gupp. These Astromons enjoy lazily lofting on the water’s surface, but appendage on their head, originally used to self-defence, ends up attracting predators now that it is much larger.
Fully evolved, the Golphon becomes even larger and flashier, then its less evolved counterparts. It likes to use its fins to swim gracefully through the water, and its potent sleep-inducing liquid is sometimes used in medicines a paralytic.