If I wanted to say "Those butterflies are the prettiest of all." would I say this sentence or should the "esas" be "estas"?

Question

Esas mariposas son las más bonitas de todas las mariposas

Answer 1

those = esas mariposas (adjective)
those = ésas (pronoun)
those (far away) = aquellas mariposas
those (far away) = aquéllas (pronoun)

these = estas mariposas
these (ones) = éstas

The sentence you wrote is correct.

Sra