Heart of the Sea

A heart of the sea is a rare item that can be crafted into a conduit. And also has no use

Crafting ingredient
Education Edition hasn’t received all of the Update Aquatic features yet, and one of them is the conduit, so hearts of the sea cannot be used to craft conduits in Education Edition.

Trivia

 * Before the release of the heart of the sea there was an entry found in the buried treasure chest loot table named  which was later revealed to be the heart of the sea. Despite the name change the heart of the sea continues to be referred to as the   in most game files.

Herz des Meeres Cœur de la mer Hart van de zee Serce oceanu Сердце моря Серце моря 海洋之心