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Name: Terrnil (I suck at coming up with names, and would like this one to be changed later)

Detailed Description: Terrnil are a slender, slightly lanky race on land, and while appearing a much larger, and more agile race when under water. The average hight is 6 feet(183cm) with a variance of around 4 inches(10cm), though some individuals near 7 feet(213cm). Their shoulders are on average the little wider then their hips, typically being between 17 and 22 inches(43-56cm).
Their limbs are all wider then average racial proportions, giving them a slightly broad appearance.
Being an aquatic race they have fins coming out of various body parts, most notably: the back of the shoulder(which are the longest fins possibly being longer then the rest of the body), the side of the forearm(the shortest fins), the middle of the back(fairly short), the sides of the pelvis(second longest fins sometimes longer then the legs), and the sides of the calf(usually down to the feet, though they can be longer). Though some have fins in other places, most commonly the side of the hand and the feet. The fins are usually long, narrow, and slightly bony, however their shape shifting abilities allow them to change this to a degree. The fins are most commonly blue, however some reds and purple colors also appear and are not considered too uncommon.
Their skin is unusual as it appears incredibly smooth, holding few lines or bumps, and none on their knees or elbows. The skin color is typically light blue, between white and sky blue, with some accenting features on certain areas, mostly the face, back, and chest.
The race, though aquatic, tend to keep long hair, which tends to be multi shaded, the most common of which is a blond and green. The rarest shades are dark on light combinations, with dark shades themselves being rare.
The two genders appear very similar, the greatest difference is in the chest, while females do have breasts, they are small compared to most races. The real noticeable difference is in shape and size, male chests are on average more barreled, and up to twice the size of female chests which are also flatter, excluding the breasts themselves. Male faces also appear slightly more masculine by human standards.
Beyond this however androgyny is common, such as females having barreled chests or males having slim. However members of the two genders tend to use their shape shifter abilities to help clarify their genders, with females maintaining their fins at a much larger size when on land, and males maintaining a smaller fin size even when under water. Females also often use their shape shifter ability to increase breast size around other races, however it is not commonly done inside Terrnil communities.

History of Origin: Unlike other races Terrnil tend not to care of their race's origin. However this has led them to having a great many origin stories, most common of which is that they are the result of sentient water receiving a physical form. Which happens to be the prevailing belief among other races as well.
Another origin story is that they are the result of a great massacre of life, resulting between a battle between the land races and sea life. As the story goes after the battle, which had no winner, the bodies of the dead were swallowed by the sea. The sea seeing the great loss of life took the bodies and reformed them into a being similar to all. This story is the second most common among the race itself, and is most common among people who hate the race, who typically twist it to be darker and more necromantic.

Specialties: Terrnil are a race with shape shifting powers, though not true shape shifters the race can modify their bodies a great deal. All members of the race have two basic forms. A land form, where they typically look similar to humans or elves, though with various fins poking out of their bodies. And a water form, where all of their joints change shape and allow for greater mobility, the fins extend to their full length, the feet flatten in line with the leg, the fingers gain webbing between them, and the neck shifts so the face can be forward in the marine environment.
Beyond the two forms they can modify the shape of their fins a great deal, going so far as to make fins which can mimic nearly any form of fin. They can also change their body's appearance a significantly, to, where in skilled individuals, they can mimic other humanoid races, and in the most skilled individuals even dwarves. However they can not change their skin tone, though they do have some ability to modify the accent colors. Also their fins never truly disappear, and the process can be very slow, they are also unable to change their faces, or for that matter even their heads. The shape shifting is a basic part of their ability to handle both land and water, which has been taken to extremes by some.
The race, being aquatic, have gills and can thus easily breath underwater, though they close and disappear in their land form.
The race are also among faster healing races, and are among the races that are able to regenerate lost limbs. They also have one of the best immune systems, able to fight off and prevent most infections. Do to the bacterial dangers of the marine environment, they need to be able to heal wounds quickly and prevent infections.
They are also very fast, and very agile, both in the water, and on land. Their top running speed is around 40mph(64kph) and top swimming speed is around mph55(88kph), both of which are sprints, and are unable to be maintained for more then 30 seconds. Most of their speed and strength is short lived, and happens in bursts. This is needed for them to be able to escape some sea creatures.
Their fins are much tougher then the rest of their bodies, often being able to block swords without damage, they are also able to add a sharp edge to them with their shape shifting. These exist in place of any other natural weapons which other marine predators poses, as the development of tools underwater can be difficult. This also serves as a replacement for armor as their shape shifting prevents the proper use of armor.

Combat: The Terrnil often fight one another in weaponless tournaments attempting to show off, or to settle non-legal disputes.
The race also tends to be common as mercenaries in coastal areas.
Because of their nature and general lack of fore thinking they tend to get into a lot of fights.
When in combat they will often strike fast and furiously with bladed weapons and their fins, striking with speed only otherwise seen in elves, in an attempt to end the fight quickly, or wound their opponent so as to give themselves a reprieve.
They also tend to fight with a more endurance based defensive style using bladed pole weapons.
In fights against their own race they tend to fight in rounds, fighting furiously then taking a break between rounds.

Alignment tendencies: Terrnil tend not to think much about consequences, and instead focus on doing what they feel like doing, and can thus be seen as rather chaotic. They however tend to form strong bonds with friends, or even strong bonds to authority figures, who they would otherwise ignore. Due to forming a strong bond with authority figures they can be very loyal towards authority, or if they don't form such bonds, be rather uninterested in such things.
The race is rare in that they tend to form morals based upon desires and emotions, such as a general notion against killing only for the reason that that might prevent them from dealing with or using that person in the future.
They also tend to like or dislike people intensely.

Climate and Terrain: The race basically requires temperate to tropical climates with large amounts of rainfall. However they can manage cold areas, provided they can sleep in places which are much warmer.
Of terrain they prefer coastal areas, and for inland they prefer wet areas.
Of water they prefer clear shallow areas.
They require a high humidity, or suffer all manner of health problems.

Family/Organizational Structure: The family structure of the Terrnil is nearly non-existent, and it is hard to determine who the parents are, who siblings are, and who are unrelated friends.
This is mostly because Terrnil children are born far more developed then other races, at the equivalent of a 5 year old human, and they develop much faster becoming adults by the age of 10. This is because of a general need to develop quickly and be able to swim properly very soon after birth.
All individual members of a family, who can afford to, own their own home, as well, the family, or even just a group of friends, own a family home. The family home is typically home of the children, and where they are raised, it is also a place for socializing.

Any further information you can think of: Terrnil are actually a very long lived race having the same level of immortality as elves, however they are far more prone to early death then other races, do to their behavior. Do to this most races think they are mortal race like humans due to typical life expectancies.
An oddity of child birth among the Terrnil is that females of the race have their entire torso increase in size when pregnant, and only show typical signs of pregnancy when nearing the child's birth, at the late 14th month. This leads some races to think that they lay eggs in place of having life young.