Under water it’s crawling with water snakes. Just like frogs that only croak when they feel safe, the snakes wait until they don’t hear anything: then they multiply at lightning speed.
As underwater glow-worms, they sway across the bottom, until someone makes a sound: then they quickly shoot away. There will be people who want the animals to disappear as quickly as possible. Others will quietly wait and enjoy the illuminated snakes, as if a party is going on under water.