Species- Floating fish butts (created by ~Ad-opt
Likes- water, swimming, ponds, koi fish, anything Chinese/Japanese related.
Dislikes- getting dirty, murky waters, and when her fish falls out of the water.
Her and her fish are directly connected, after they are born they need a fish egg in their water tails so they can grow up with a fish. The older the pony, the older the fish. When the fish dies, the water depletes and the pony gets really sick. Sometimes though the fish dies early or is lost, and the pony will get sick and die. Although, sometimes the fish can be replaced, this is rare and is almost completely uncommon.
The most common fish is koi, and goldfish. The other types can range from anything domestic to any other type of small fish, depending on where the pony lives. The rarest would be sharks, turtles, frogs, snakes, crabs, and other sea animals that are not typically fish.
These types of ponies usually don't have cutie marks as the majority of their time is spent taking care of the fish in their tails.
(also added a reference to the fishes colors without a blue hue)
(ill prob be using that base for my references from now on)