Final answer:
The blue dragon nudibranch steals stinging cells from its prey, making the statement true.
Step-by-step explanation:
The statement is true.
The blue dragon nudibranch, also known as Glaucus atlanticus, is a sea slug that has the ability to steal and repurpose the stinging cells, called nematocysts, from its prey. It feeds on cnidarians, such as Portuguese Man o' War, which have stinging tentacles. The nudibranch stores the stolen nematocysts in specialized structures called cerata along its body and uses them for its own defense, making the statement true.