Back to today’s briefing

Story perspectives

Rare Bioluminescent Fireworms Spotted Spawning in Long Beach

4/13/2026

41 5 Full Breakdown

Summary

Story summary

Bioluminescent fireworms were filmed in Long Beach, California, marking only the second sighting.
Experts say the worms ascend from the seabed during specific moon phases to spawn.
Females swim in circles to create a luminous mucus trail that attracts males.
The spawning event lasts about 30 minutes before the worms return to the seabed to build tubes for shelter until the next spawning cycle.

1 of 1

Story summary

Bioluminescent fireworms were filmed in Long Beach, California, marking only the second sighting.
Experts say the worms ascend from the seabed during specific moon phases to spawn.
Females swim in circles to create a luminous mucus trail that attracts males.
The spawning event lasts about 30 minutes before the worms return to the seabed to build tubes for shelter until the next spawning cycle.