Carcharians were fishy humanoids with scaly skin, webbed feet and hands, gills, finned tails, claws, and fin-like crests on their backs. In other realms, the Amphibimen were called Sahuagin, Sharkmen, Sahagin, Sea Devils, Silurians, or Frogmen. Carcharian were usually green skinned, darker on the back and lighter on the belly. Their coloration rendered them tremendous disadvantage in the surface lands of the World of the Three Suns, where greenness was rare. Adult male Carcharians were over six feet tall and weighed about 200 pounds. Additional webbing appeared down the back, at the elbows, and notably where Drelves developed ears.
Carcharians dealt very harshly with puny, passive offspring. Compulsory fighting to the death eliminated weaker young Amphibimen. Carcharians seemed fixated on all aspects of consumption, and eager to weed out anything they saw as weak or unworthy to compete for resources. Savage fighters, Carcharians fought savagely, asked for and gave no quarter, and, when swimming, tore at opponents with their sharp feet. The Sharkmen also used nets to entangle prey. Spears and tridents were their favorite weapons. One in 216 specimens was a mutation with four useable arms instead of two. The four-armed mutations were usually black, fading to gray in color.
Carcharians had inhabited grottos in and around the underworld sea for ages. Prominent Amphibimen combined jewels, teeth, bones, and fabrics into bling that signified their position in their community.