Fishbone is what remains of the Clownfish, a comical monster which just so happens to be shaped like a suit of armor. 25 seems to be the magic number with this armor, as it has a weight of 25, level and strength requirement of 25, and 25 points of damage reduction (comparable to scale armor of its level, which is quite impressive considering how little strength it actually takes to use). In addition to its fantastic defense, it gives an extra 5 vitality and a good amount of poison resistance. Armor this good is usually depressingly expensive, but the Fishbone is both durable and relatively cheap. Its only downside seems to be its weight.
Weight: 25 | Level requirement: 25 | Strength requirement: 25
Damage reduction (armor): 25
Poison resistance: +25%