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Grade 11Zoology

What are placoid scales?in which phylum are they present

Profile image of Sremati
9 Years agoGrade 11
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1 Answer

Profile image of Umakant biswal
9 Years ago
Placoid scales (dermal denticles) are tough scales that cover the skin of elasmobranchs (sharks and rays). Even though placoid scales are similar to thescales of bony fish, they are really modified teeth and are covered with a hard enamel. 
they are generally found in PHYLUM CTENOPHORA . 
hope it clears