Definitions

1. noun

A species of bioluminescent dinoflagellate, Noctiluca scintillans, that can cause red tides.

“The beachgoers were surprised by the sudden appearance of Noctiluca, which lit up the water with a vibrant red glow.”

2. noun

A type of jellyfish-like organism that emits blue-green light when agitated or disturbed.

“Noctiluca are often found in tropical waters and can be seen dancing in the waves at night.”