Homebrew Atlantean Species Details

Atlanteans are an amphibious race. Their bodies are featureless, sleek, flexible, and hydrodynamic, covered in a soft, rubbery skin that ranges in color from shimmering periwinkle and coral pinks to dark, inky teals. Many have intricate glowing markings along their limbs and torso which are natural bioluminescence they can control to communicate or hypnotize prey.
Their heads are crowned with frilled fins or tendrils, used for subtle expression underwater. Instead of hair, many Atlanteans have fleshy crests or finned extensions that express themselves depending on their emotions. Their large, pupil-less eyes are adapted to see clearly in the abyss, often glowing faintly in the dark.

Their hands are five fingered and webbed, with nails that can harden into claws. Their feet are similar, with three or four wide toes built for aquatic propulsion. A powerful, flexible tail often decorated with glowing bands or flowy fins, sprouts from their lower back, aiding in quick swimming and agile turns. All Atlanteans have gills placed somewhere on their body that close flush when on land, and internal air sacs allow them to survive above water for extended periods. An Atlantean could theoretically live on land forever if they keep themselves hydrated.

Atlantean Traits

An amphibious species

Amphibious

You can breathe in water. Atlanteans can survive an amount of hours on land equal to their constitution modifier. Drinking 1 liter of water extends this period by 1 hour.

Darkvision

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.

Leviathan Mastery

You start the game with one leviathan weapon of your choice. You have proficiency with all leviathan weapons and ignore the loading property of any leviathan firearm. In addition, attacking at short or long range with a leviathan firearm doesn't impose disadvantage on your attack roll.

Emissary of the Sea

Aquatic beasts have an extraordinary affinity with your people. You can communicate simple ideas and emotions with beasts that can breathe water. They can understand the meaning of your ideas and emotions, and you can understand their emotions and intent in return.

Regeneration

At the start of your turn, you can expend a hit dice to regain HP equal to your hit dice + Constitution

Natural Weapons

Your claws and teeth are natural weapons, which you can use to make unarmed strikes. If you hit with them, you deal slashing damage equal to 1d8+ your Strength or Dexterity modifier for claws, or piercing damage equal to 1d8+ your Strength modifier or Dexterity for teeth.

Languages

You know Common Sign Language and can understand Common though you cannot speak, read, or write Common.