Fishing is something special here in OxygenOT because you can fish for 3 things:

Normal fishing — catch fish using worms and a normal fishing rod from any water.

Special fishing — catch stat-boosting fish using worms and a normal fishing rod from any water.

Boss fishing — catch and spawn bosses using worms and special fishing rods from a specific location.

• Enter the specific fishing boss area from the teleport in temple.
• Stand at the fishing spot (as shown below) and use your special fishing rod with worms to start catching bosses.

• Fishing here mainly depends on your fishing skill — the higher your skill, the better bosses you can catch.

Tools needed for boss fishing:

• Royal Fishing Rod or Mechanical Fishing Rod
• Worms
• Flask of Bosses — use it on the boss to catch it. (Once used, you catch the boss and can spawn it in the boss rooms)

Catching & spawning process:

• Fish a boss, then use the Flask of Bosses on it. (You have only 5 seconds to catch it!)

• Use the item in the fishing boss rooms to spawn the boss and kill it.