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What are placoid scales?in which phylum are they present

What are placoid scales?in which phylum are they present

Grade:11

1 Answers

Umakant biswal
5349 Points
7 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 
 

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