The Lost Explorers are the second or fourth boss of The Venomous Abyss raid, depending on your route. 

This is a three-target fight where players are trying to prevent Mor'zahi from completing his Final Ascension. To prevent this, players feed Disgusting Fish to one of the possessed tortollans before Mor'zahi's cast finishes. Each tortollan can only be fed once, and players need to defeat the possessed tortollans before they run out of fish. 

Bloodlust on Pull.

• Three bosses.  Start by tanking Nama and Iku.  After first Shredding Shards debuff from Iku, move the two together and taunt swap.

• Keep Nama next to whichever boss has the highest health and move the lower health one away.  Do this on every taunt swap.

• Bosses need to die at the same time.

• On Normal can stack all 3 bosses.

  • (1) First Mate Nama - tank next to 1 other turtle, not both.

  • Puts stacking debuff on tank.

  • Shell spin - random (melee?) player targeted - aim away from raid.  3 shells spin out, avoid.

    • When hit by a fish, does Mighty Thud - 3 way group soak.

  • (2) Scrollsage Iku - tank next to 1 other turtle, not both.

  • Interrupt Icebound Flames.

  • Someone will get purple arrow over them, Iku will "blink" to them doing raid wide damage, lessened by distance.  Run away!

  • Tank swap after 7+ Shredding Shards

    • When hit by a fish: Frostfire circles - some will get frost some will get fire circles.  Frost stand next to fire, drop puddle then run into the other puddle to remove (so if you had fire, run into the frost puddle)

  • (3) Trader Gebbo - cannot be tanked and just walks in a big circle.

  • Throws out boxes you run over.  Sometimes they're empty, other times they have a fish.  One box each.

  • When hit by a fish he throws out mushrooms and someone will be targeted with red arrow - run out to the edge to drop the bomb.

    • When the bomb explored, bounce on a mushroom to jump over the bomb blast wave.

• There is also Mor'zahi who doesn't do much just gains energy.  

• Fish: You can only hit each turtle once.  In melee range.  Someone picks up the fish, gets an extra action button, waits until Mor'zahi is at around 90% energy and then hits one of the bosses with it.

Visual Aid: https://raidplan.io/plan/zrg95jyxzq4gaweh