River troll

A River troll can only be found in the Enchanted Valley, by fishing in the Fishing spots there. They have no level, and are very inaccurate. They always drop Big Bones.

Before the update on 25 February 2009, River trolls were a random event that occurred while a player was fishing. These NPC monsters would appear and attack players when the player initially made an attempt to fish. The river troll's combat level used to vary depending on that of the player's, up to a maximum of level 159.

Attack pattern
The River trolls now have a max hit of 1, but 170 Hitpoints.

They used to have a melee attack and were slow to catch up with the player if the player ran away during combat. Once the player ran a few squares away, the troll would stop pursuing the player and disappear.

Cries
"You killed da sea troll queen! You die now!"
 * "Fishies be mine! Leave dem fishies!"
 * (After Swan Song):

Drops

 * Big Bones
 * Long bone(rare)

Old drops
They can drop multiple raw fish at a time including:
 * Bones
 * Big Bones
 * Fishing potion (3) (m)
 * Fishing bait (up to 50)
 * Feather
 * Half key (m)
 * Oyster (m)
 * Casket (m)
 * Spinach roll
 * Raw tuna
 * Raw salmon
 * Raw trout
 * Raw herring (m)
 * Raw pike
 * Raw sardine
 * Raw shrimp
 * Raw anchovies
 * Raw swordfish
 * Raw shark (m)

Trivia
River trolls might also attack players who are fishing in the sea, such as on Karamja, even though their name suggests that they only come from a river.

This issue has been addressed in the Postbag from the Hedge:

"Dem fishes be mostly in de river. Den big trollnado come. Me and dem missus in dem whirlpool, get into dem sea. Me’s get in dem big trollble. Me hear dem trolley get us back to Trollheim. Me’s try eatin dat clownfish, but it taste funny to me. If you’s helping dem trolls get home, me gives big trollipop! Maybe."