The Merpeople are a race of crustaceans.
The merpeople have six pairs of arms. The first pair is large and designed for delicate manipulation. The others are much smaller and are primarily vestigal. They have two eyestalks and an array of antennae for sensory perception. At their back is a large fin made for swimming.
Until the late 19th century, it was unknown that Mermen were even capable of anything resembling an actual culture, due to the difficulty of reaching an underwater species.