Pearls & Oysters

I would be interested to make a request for Pearls and oysters to be added into the game. pearls being decorative and being able to use them to find shipwrecks and/or ocean monuments (kind of like eye of ender for end portal), maybe being a slightly different colour (like the rainbow effect in the reflection of certain objects or substances IRL) in the general direction of one of those things. Also the oysters can be eaten, leaving their shell potentially as a decorative item also. 

Oysters can also be used as a food. maybe even with a risk of a certain effect for eating a bad one too? Something like nausea or hunger?