Question

How can I obtain a Marlin Trophy? And what is it useful for? And for how much can I sell it and where?

Answer 1

Marlin Trophy is a decoration item, which you can hang on wall in your house/guildhall. 

First, you need to loot Marlin , from these monsters:

• Island Troll (0.07%)
• Thul (68.04%)
• Undead Jester (0.21%)

The next step to make your Marlin Trophy will be completing Marlin Trophy Quest. You need to bring a marlin to the NPC Pemaret on Cormaya Ship. He will be happy to exchange it for you. (Hi - Marlin - Yes)

Marlin Trophy can be sold to Gnomission in Gnomegate for 5000 gold. (Only after slaying 20 Warzone bosses.)

Source: https://tibia.fandom.com/wiki/Marlin_Trophy & https://tibia.fandom.com/wiki/Marlin_Trophy_Quest