In the far future, a fleet of human settlers arrives in a star system containing an unusual planet; 90 times the mass of Earth, with only 3 times the radius. Rocky planets with similar mass are known to exist, such as Kepler-277b, but this is the first in the habitable zone of a star. It hasn't evolved complex life of its own, so the colonists decide to introduce Earth-based organisms. The planet has a shallow ocean covering 40% of the surface. The colonists alter the atmosphere to be similar in composition to Earth's.
What flora and fauna could survive on this planet?