Swarm of Suitors

Swarm of Suitors is an event quest in Fallout 76.

Quick walkthrough
Wander about Toxic Valley and if you happen to be within near Grafton Lake, you'll likely receive a communication over the radio from the Grafton Mayor. He'll ask you to help exterminate the "crab-like creature" hordes from entering the lake.

Detailed walkthrough

 * At least one player get to the island
 * Kill Mirelurk Leader before it reaches the spawning grounds
 * Stop the horde from reaching the spawning grounds
 * Kill the next Mirelurk leader before it reaches the spawning grounds
 * Stop the next horde from reaching the spawning grounds
 * Kill the last Mirelurk leader before it reaches the spawning grounds
 * Stop the last horde from reaching the spawning ground
 * Kill the Mirelurk Queen