Currently it says that they can drop Nether Wart Jam and Nether Box while according to the wiki and the current 1.12.2 code they have the following drops:
A Shiny Pearl's
A rare chance of dropping either a Ore Box or a Book Satchel
A rare drop of Old LuggageSeashell Hairpin and a Mermaid Doll
See Wiki page
Currently it says that they can drop
Nether Wart JamandNether Boxwhile according to the wiki and the current 1.12.2 code they have the following drops: AShiny Pearl's A rare chance of dropping either aOre Boxor aBook SatchelA rare drop ofOld LuggageSeashell Hairpinand aMermaid DollSee Wiki page