Mahou no Mako-chan is a tV series anime that premiered in fall 1970, produced by Toei Animation.

About the production: there are 48 episodes of about 24 minutes and its current status is "finished".

Its main genres are mahou shoujo and romance, with themes such as Magic, Mermaid and Heterosexual.

On AniList, Mahou no Mako-chan has an average score of 62%, an average score, and appears on 1,014 users' lists.

Mako is a young siren and daughter to the King of the Sea. In a stormy day she rescues the young sporto Akira from a wrecked ship, but ends up falling in love with him. So, with help from the Witch of the Sea, she's transformed into a human, and becomes a highschool student who helps everyone with her strong sense of love and justice and her magical pendant, the "Tear of the Mermaid" (Source: Anime News Network)

Official synopsis from AniList.