The term 'canal in the cochlea' refers to the scala, which is a fluid-filled tube located in the inner ear. It is part of the cochlea, which is responsible for hearing and balance. The scala is divided into three sections: the scala vestibuli, the scala tympani, and the scala media. The scala media is filled with endolymph, a fluid that helps to transmit sound waves to the auditory nerve. The scala is an important part of the auditory system and is essential for hearing.