Board Thread:Off Topic/@comment-29684190-20191110024409/@comment-36926079-20191120035544

You could make the fishing lure double as a speaker. According to this website, fish have motion detectors for ears- unique structures in the fish lag behind when the fish is moved by waves in water. This means they are more sensitive to sound than people in this aspect.

If aquatic grimm have similar structures, then they should be just as sensitive to loud noises as fish are, making the speakers an excellent deterent from attack. Extremely loud sounds can cause tissue damage, temporary or permanent hearing loss and disorientation in fish.

You can also use the speaker to disorient people with high pitched frequencies similar to those in the supposed Cuba attack.

https://biasproject.wordpress.com/news-from-the-ocean/fish-and-sound/