semicular canal malleus cochlea
If you mean in the inner ear, the cochlea which contains the Organ of Corti, and endolyph and perilymph, also the 3 semicircles of the labyrinth - the ampulla, the utriculus and the sacculus. Also...
endolymph, can also be called scarpa's fluid
perilymph
The membranous labyrinth are the fluid-filled membranous sacs of the inner ear that are associated with the senses of hearing and balance.