Who said "Teaching a dolphin to swim."?

Latin proverb. Source: Erasmus, Adagia (Bland ed. 1814).

What is the original Latin?

Delphinum natare doces. Translated from the original Latin by Spartan Surfers.

Teaching a dolphin to swim.

Latin proverb, Erasmus, Adagia (Bland ed. 1814)

The source

"Teaching a dolphin to swim." This Latin proverb is recorded in Erasmus, Adagia (Bland ed. 1814). Translated from the original Latin by Spartan Surfers.

"Delphinum natare doces"

Original Latin, Erasmus, Adagia (Bland ed. 1814). Latin: Erasmus' Adagia as printed in R. Bland, Proverbs Chiefly Taken from the Adagia of Erasmus (1814), archive.org.

Who said it

Proverbs of the world (Every age). Sayings from the Latin, Greek, Norse, Japanese, Chinese and more, each traced to an old source in its own language.

Questions

Who said "Teaching a dolphin to swim."?: Latin proverb. Source: Erasmus, Adagia (Bland ed. 1814).
What is the original Latin?: Delphinum natare doces. Translated from the original Latin by Spartan Surfers.