Ability Score Increase. Your Strength Score Increases by 2. One Score, Based on Your Draconic Ancestry, Increases by 1.

Within 60ft You Can See The Heat From Living Beings Bodies.

You've Been Blessed With The Ability To Breath Underwater And on Land. You Are Also Able to Use Your Breath Attack When Half Submerged From The Water

You Cannot Wear Armor And You Gain no Armor Bonus From Dexterity, But Your Base AC is 15.

You Can Withdraw Into Your Shell as an Action. Until You Emerge, You Gain a +4 Bonus to Your AC, And You Have Advantage on Strength And Constitution Saving Throws. While in Your Shell, You Are Prone, Your Speed is 0 And Can’t Increase, You Have Disadvantage on Dexterity Saving Throws, You Can’t Take Reactions, And The Only Action You Can Take is a Bonus Action to Emerge From Your Shell. As Your Shell is Spiked, Any Melee Attack That Connects Causes 1/2 Damage Returned to The Enemy Attacker.

Any Attacks That Target You From Behind And Hit Your Shell Halves Any Incoming Damage, Not Including Bludgeoning Damage.

You Can Claw as an Unarmed Attack For 1d6 Slashing Damage.

You Can Breathe a 30 ft Line of Pressurized Water and Acid, Dealing 2d6 Piercing Water And 2d4 Acid Damage, Dex Save for Half Damage. DC = 10 + Con Mod + Prof. Using Your Action, You May Consume as Much Water as Possible. This Augments Your Breath Weapon, Changing From a Gas to a Liquid, Which You May Explosively Regurgitate in a 30 ft Line on Your Next Turn. When Expelled in This Fashion, Your Breath Weapon Adds 3 to The Base Saving Throw, That is, a Dexterity Save of DC 13 + Your Constitution Modifier + Your Proficiency Bonus

You've Gained a Tail With Some Fin Which You Can Use to Your Advantage. Your Movement Speed Stays the Same in The Water And You Can Use Your Tail as a Natural Weapon, Being Able to Knock Over Your Opponent For 1d6 Bludgeoning Damage or Grab Them With Violent Force.

You Are Immune to Your Own Breath Weapon Damage. As Acids Other Than Your Own Are a Different Chemical Makeup, You Only Have Resistance to Acid Damage.

When Water is Added to Your Acid Breath it Changes it to a Liquid Due to Your Body Only Producing an Acid Like Gas. Reduces Distance to 5ft Controlled on Gas Breath Form. Increase Distance When Water is added to 30ft Line Liquid Breath Form.

You Are Able to Use Your Breath Attack Multiple Times a Day Than Other DragonBorne Due to it Primarily Being Dependent on Water And Requiring You to Consume Large Amounts of Water. Hence Why Damage is Reduced. You may use your breath weapon a number of times equal to your proficiency bonus each day A Minimum Of Twice A Day.

Due to The Amount Of Gas Your Body Produces You Must Consume More Food Than Other Dragon-Borns. Due to Your Hunger You Require 3 × The amount of Food Than Others.

You Gain The Ability to Eat Any Meat Raw Without Gaining Any Negatives And Due to The Acid in Your Body Breaks Down Any Harmful Content in The Raw Meat. Immune to Rotten Food.

Due to Your Aquatic Ancestry You Are More Susceptible to Electrical And Ice Based Attack And Take Double The Amount of Damage Than Normal.

Your Reptile Ancestry Makes You Immune to Extreme Heats, Unfortunately You Are Susceptible to The Cold. You Take Double The Amount of Damage in Freezing Climates  And You Gain a Disadvantage on Dexterity Rolls In Said Environments.

You Are Able to Move Through Marshlands, Wetlands, Bogs, Fens, And Swamps With Ease. You Are Able to Gather 2 × The Amount of Food in These Areas