Only found in the deepest waters, and rarely at that, Dragon Turtles seem to be mostly turtle, with a little bit of Dragon somewhere back in the family tree.
They are mostly peaceful creatures, but have enough Dragon in their bloodline to occasionally eat a ship or two.

Sages have long pondered the exact relationship between Dragons and Turtles and reason for this creature’s existence… The only real viable explanation is that somewhere back many centuries ago, a very bored Dragon saw a rather sizeable turtle and became unusually curious about… stuff. Regardless, it’s possible that these creatures live for so long that they may all be offspring of that original and (hopefully) singular encounter.

Hammerheads are one particular species of Merfolk who seem to always turn out bad.
We’re not sure if it’s because of the bullying they receive, due to their oddly-shaped heads, or if they’re just inherently bad, and their heads have evolved so it’s difficult to look them in the eyes and tell if they’re lying.

Either way… Never trust a Hammerhead.