The Giant Sea Snake is encountered at the end of the Royal Trouble quest. It is not as strong as its combat level suggests, but an antipoison potion, preferably super, is vital, as the snake is poisonous with damage that starts at 9. It fights with melee up close and ranged from a distance, but it cannot detect the use of prayers. Like its offspring, it is vulnerable to Magic. It drops the heavy box which is needed to finish the quest, and it can only be fought once.

Level 40 Slayer is required to kill this creature.

The best way to defeat the snake is to attack it up close with magic to exploit its weakness. This way, it will not use its ranged attack, so players can freely use Protect from Melee to reduce the majority of the damage. Other factors such as what food to bring and what armour and weapon to use are left to the player's decision. It is recommended to bring at least lobsters or swordfish. A dwarf multicannon can be setup in this area.



Item Quantity Rarity GE market price
Big bones Big bones 1 Always 254
Heavy box Heavy box 1 Always Not sold


Item Quantity Rarity GE market price
Watermelon seed 5 Watermelon seed 1 Uncommon 87
Poison ivy seed 5 Poison ivy seed 1 Uncommon 19
Herb seed 5 Guam seed 1 Uncommon 15
Herb seed 5 Marrentill seed 1 Uncommon 12
Herb seed 5 Tarromin seed 1 Uncommon 12
Herb seed 5 Harralander seed 1 Uncommon 33
Herb seed 5 Toadflax seed 1 Uncommon 1,000
Herb seed 5 Ranarr seed 1 Uncommon 47,899
Herb seed 5 Irit seed 1 Uncommon 61
Herb seed 5 Avantoe seed 1 Uncommon 1,792
Herb seed 5 Kwuarm seed 1 Uncommon 597
Herb seed 5 Snapdragon seed 1 Uncommon 60,933
Herb seed 5 Cadantine seed 1 Uncommon 1,385
Herb seed 5 Lantadyme seed 1 Uncommon 2,487
Herb seed 5 Dwarf weed seed 1 Uncommon 402
Herb seed 5 Torstol seed 1 Very rare 60,225


Item Quantity Rarity GE market price
Coins 25 Coins 23; 32; 44 Uncommon Not sold
Adamant dart tip Adamant dart tip 2 Uncommon 404
Pearl bolt tips 5 Pearl bolt tips 3 Uncommon 120
Broad arrow 5 Broad arrow 4 Uncommon Not sold
Water orb Water orb 1 Uncommon 1,310
Water rune Water rune 15 Uncommon 75
Mist rune Mist rune 1 Uncommon 116
Fishing bait Fishing bait 50 Uncommon 250
Raw bass Raw bass 2 Uncommon 1,020
Raw lobster Raw lobster 1 Rare 210
Casket Casket 1 Rare 838
Clue scroll (medium) Clue scroll (medium) 1 Rare Not sold
Long bone Long bone 1 Rare (1/400) Not sold
Curved bone Curved bone 1 Very rare (1/5,000) Not sold

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