race features:
Ability Score Increase: Your Constitution score increases by 2, and your Wisdom score increases by 1.
Size: Whalefolk are large creatures, standing between 7 and 8 feet tall. Your size is Medium.
Aquatic Nature: You can breathe underwater and are adapted to life in the ocean depths.
Echolocation: You have proficiency in the Perception skill. In addition, you can use echolocation to perceive your surroundings. As an action, you can emit sound waves, gaining blindsight with a range of 60 feet for 1 minute. During this time, you are deafened because of the intense sensory feedback. Once you use this ability, you can't use it again until you finish a short or long rest.
Whale's Resilience: You have advantage on saving throws against being charmed or frightened.
Oceanic Heritage: You have a natural affinity for the ocean and are proficient in the Athletics skill.
Sperm Whalefolk:
Deep Diver: You have resistance to cold damage, and you are adapted to extreme cold environments, as befitting the depths you often explore.
Sonic Blast: Once per short or long rest, you can unleash a powerful sonic blast in a 15-foot cone. Creatures in the area must make a Constitution saving throw (DC 8 + your Constitution modifier + your proficiency bonus) or take 2d6 thunder damage and be deafened for 1 minute. On a successful save, the damage is halved, and the creature is not deafened. The cone increases to 30 feet at 6th level, 45 feet at 11th level, and 60 feet at 16th level.