DK 
DK Super Readers Level 3 Bioluminescent Animals 

Use your reading superpowers to learn all about why some animals light up, from fireflies to glow worms, and bacteria to sharks – a high-quality, fun, non-fiction reader – carefully levelled to help children progress.
Bioluminescent Animals is a beautifully designed reader all about how and why some animals light up their different worlds.
The engaging text has been carefully levelled using Lexiles so that children are set up to succeed.
A motivating introduction to using essential non-fiction reading skills.
Children will love to find out about fireflies flashing to communicate, bacteria lighting up to be eaten, and animals using light for camouflage.