Question

Explain beanchaial arches of scoliodon??​

Answer 1

Answer:

But in Scoliodon the spiracles are vestigial pits in the pharynx with no lamellae or external branchial apertures. The hyoid arch bears only a holobranch each, the fifth branchial arch has no branchial lamellae and thus Scoliodon has nine hemibranchs on each side