Gastropoid

Humanoid snails, heavily armored by shells, you can be a bit on the slow side. Your people, though not the most friendly or talkative, can be far more deadly than they appear. Gastropoids like you lay trails, which lubricate their path when they need to move quickly.

Ability Score Increase. Your Strength score increases by 1.

Age. Your species ages at about the same rate that humans do, reaching maturity around 16-18 solar years and living to be just under a century without advanced medical technology.

Armored Body. You cannot wear normal armor, but you have a natural AC of 17, unaltered by your Dexterity modifier.

Semi-Aquatic. You can breathe underwater.

Size. You are the shape of a typical humanoid, making you Medium size.

Slime Trail. As a bonus action you may lay a slime trail along any ground you have moved through. All squares you move out of count as difficult terrain for 1 round.

Speed. Your base walking speed is 25 feet.

Superior Smell. You have advantage on all ability rolls related to your sense of smell, such as some Perception and Investigation tasks.