Polypod

As the first "arthropod" on Edalyth, this clade of creature, came to known as the "polypodia" meaning many feet", will be one of the first organism to venture out to the open sea, out from the safe deep sea. As the clade evolved, it evolved "feet" that is the extended light bluish part from the segment. Behind the "feet"(I will term the "feet" as the pedal) is the premature gills, passively gaining oxygen as it moves.

Light sensers(early-compound eye) is dotted around its face, and it filters feeds tiny microorganism from water. The food travels along its body, and excreting the waste from its back.

Their size is fairly small, only around 10-20 cm. However, as they evolve and diverge into other species, they will grow big, possibly becoming the first animal the go to the land...

Clade
Flogeropod