Simplify the following text for a Grade 12 native English-speaking person.
Original: Their aforementioned bioluminescent `` fireworks '' are combined with the writhing of glowing arms , erratic movements and escape trajectories , making it difficult for a predator to home in .
Simplified: Their aforementioned bioluminescent `` fireworks '' are combined with the writhing of glowing arms , erratic movements and escape trajectories . These features make it difficult for a predator to home in .