Q.Fish and snake both have scales. How do these scales differ from each other?

Step 1. Bony fish (Osteichthyes) bear cycloid or ctenoid dermal scales embedded in the skin, while cartilaginous fish (Chondrichthyes) bear placoid scales, both arising from deeper skin layers.

Step 2. Reptiles such as snakes have dry, non-glandular skin covered by epidermal scales or scutes, periodically shed (moulted) as the animal grows. …

• Assuming 'scales' always refer to the same structure just …