Freeing Pirate Pete

Official quest description: Pirate Pete needs a fishcake to be protected. Talk to the Lumbridge Cook to learn how to make one.
Release date: 15 March 2006
Start: Inspect Pirate Pete.
Difficulty: *****
Length: Medium
Members only: Yes
Requirements:
Level 31 cooking
Able to defeat 5 level 30 monsters.
Items needed:
raw cod
pestle and mortar
bread
knife
fishbowl
needle
3 bronze wires.
Monsters to kill: 5 Mudskippers (Level 30/31)
Spoiler warning: Plot and/or ending details follow.
[edit] Walkthrough

Pirate Pete.
Talk to the Cook in the next room. He will tell you to get ground cod, breadcrumbs, ground crab meat, and ground kelp. He will tell you that Murphy in Port Khazard will help you get the crab meat and kelp.
Ground cod - Use your pestle and mortar on your raw cod.
Breadcrumbs - Use your knife on your bread.
Kelp and ground crab meat -

A mudskipper.
Go to Murphy in Port Khazard to get your fishbowl made into a diving apparatus. Put it on, then ask to go diving. Your weight must be under 27 kilograms (there's a bank deposit box near Murphy). Once you're underwater, find a tall green plant, pick it. Then look for a crab pen to the north. Talk to Nung. He will tell you to get him 5 mudskipper hides.
Head to the entrance to the Mudskippers' cave, on the western wall of the underwater area. Pick up 5 rocks near the entrance to the cave and then enter the cave. While in the cave (and the crab pen thereafter), you will be able to wield weapons as normal as you will be standing upright. Kill 5 mudskippers (level 30 and 31) to get hides. Take them back to Nung. Give him your needle and 3 bronze wire, then enter the crab pen. Kill one to get the meat. Climb up the chain (you may teleport from inside the crab pen if you prefer) and grind the Kelp and Crab meat to get ground kelp and ground meat. Go back to the Cook. Use the ingredients on each other and cook it to get a fishcake. Give it to Pirate Pete in the dining room for your reward