SSFG have a natural +2 bonus to their Constitution modifier.

SSFG live in relatively high concentrations of sulfuric acid, and as such are resistant to acid damage. They live at the bottom of the ocean, and so can survive extreme cold and pressure. They live near or on black smoker vents, and can survive temperatures as hot as 200 degrees C.

SSFG are sensitive to bright lights, and have a weakness to radiant energy.

SSFG get a base 19 AC. Their DEX modifier does not affect this score. They may also retreat into their shell (Protective Stance) to increase their AC by 2. While they are in this state they are Blind and can only use tremorsense to detect their surroundings. They also reduce their speed to 0 ft per turn and cannot take any reactions until they first come out of their shell.

SSFG can breathe in water or air.

You must drink a dilute sulfuric acid before each long rest. If you do not have any sulfuric acid, you will be unable to sleep and repair your shell. You will take one level of exhaustion per night without sulfuric acid, and your CON and AC scores go down by one point per level of exhaustion due to acid deficiency.

You can occupy enemy spaces if they are one size class larger than you.

At no larger than five inches in diameter, your size is Tiny.

Unless you can travel by other means, your base speed is 5 feet per round.

SSFG speak Primordial fluently, Aquan conversantly, and Common familiarly.

SSFG in their natural habitat often become weighed down by their shells over the years and starve before they reach the age of 100. However, with the help of magic, some have lived over 400 years.

SSFG have no eyes and rely on their keen sense of smell to detect their surroundings.