'Verse - Sapient Species - Akoi'lli

The species of Akoi'lli evolved to exist in the amphibious sphere (the beings that can breathe air and in water). The species is native to Arca, they had evolved from ancestors that lived primarily in water. 
Their color appearance varies between light lime green, light blue to purple hues. Their skin color varies depending on which regions of Arca they lived in. Arranged on their head like the follicles of hair on human's head, a number of tentacle-like appendages designed to absorb nutrients from water (nutrients like planktons) and filters water for oxygen. These tentacles have auto-response movements while inside water. Outside the water, the majority of Akoi'lli can't move the tentacles without training at a young age. Their digits on their hands have slightly webbed features while the digits on their feet are webbed to aid swimming. In some family groups, they have tails that vary in length that was left over from a previous evolutionary ancestor. They are able to swing the tail and often longer tails aid their movements in the water. Akoi'lli Species are not limited to the world of Arca. They can be found at least one other world. They were sighted in a world orbiting a rare ultra-violet star called Pulsar Star. Fortunately for these Akoi'lli, they were living on a Sanctuary World in which had shielded them from the majority of the star's radiation. However, there is little light visible on the surface. These Akoi'lli had adapted by seeing UV light and their veins glow in the presence of UV. 
Purple-hued Akoi'lli lives around or on the world trees (Ahti) situated close to the continental shelf of the Ahti Ocean. 
Cyan-hued (Lime Green and various light Green hues) lives on tropical coastlines.
Light Blue-hued Akoi'lli lives on coastlines of temperate zones. 
Rare pale skinned Akoi'lli (often called water ghosts) lives in-land near water sources. The water sources can be anywhere from rivers, streams, lakes, ponds and even rarer, an oasis of the deserts. They often are nocturnal, preferring to travel and hunt during nighttime.