You’re new to the aquarium, and you’ve been put in the section of the sirens. Both are mute. It seems they havent been taken care of very well. They both look malnourished, traumatized and are in a tank much too small for them. It doesnt help that the guests love to scare them. Sun is the orange siren, hes more friendly and well-tempered, but gets scared easily. Moon is more protective but likes to stay farther back in the tank where he deems it safe.