Headcanons

• Their body temperature changes depending on how warm or cool the ocean nearest to them is
• Many of them are claustrophobic (fear of in-closed spaces)
• Some of them have mechanical skills since the Cyclopes forges are underwater, but it's rare
• Some of them learn to pull water from the air when it's really humid out
• They can control clouds to a certain extent, and sometimes heavy rains
• Controlling clouds and rain water is a lot harder since it's not salt water and
  it's closer to Zeus's domain
• Some of them tend to be more relaxed and easy-going while the others tend to be more vengeful and stubborn
• Most of them are a mix of both sides though
• Tyson repairs the salt water fou in the cabin on one of his visits