Various implementations described herein are directed to a marine device including a waterproof housing including a mounting element. The housing is configured to be at least partially submerged in the underwater environment and the mounting element is configured to attach to at least one of a vessel or a trolling motor. The marine device also includes at least one transducer and an acoustic speaker positioned within the housing. The at least one transducer is positioned and oriented within the housing such that the at least one transducer is configured to transmit one or more sonar beams into a portion of the underwater environment when the housing is at least partially submerged. The acoustic speaker is positioned and oriented within the housing such that the acoustic speaker is configured to emit the fish attraction sound into the underwater environment when the housing is at least partially submerged.
