Question: what type of scale is found in scoliodon
Answer: placoid

title: Scoliodon
text: Scoliodon Scoliodon is a genus of requiem sharks in the family Carcharhinidae. It was formerly thought to include only a single Indo-Pacific species, the spadenose shark ("S. laticaudus"), but recent taxonomic research has found two species, and the formerly excluded junior synonyms need to be resurrected. Like most sharks, "Scoliodon" is marine, and is found in all open seas. "Scoliodon" has an elongated, spindle-shaped body tapered at the ends, making it a very fast swimmer. The trunk and tail are laterally compressed, while the head region is dorsoventrally compressed. The entire body is covered by an exoskeleton of placoid scales.