Emerald Sloth

Clever, amphibious, industrious, but also capable of photosynthesis, the Emerald Sloth is a mystery.

Despite having an energy budget quite above that of other animals, Emerald Sloths are incapable of starvation unless kept in the dark.

The evolution pressure that caused the only photosynthesising mammal is not quite understood, and one of the elements is suspected to be involved, for not only are Emerald Sloths quite capable, they are also highly intelligent, weaving nets of woven grasses to catch small aquatic insect larvae, which they view as a delicacy.

— Watusi Gavote, from his book 'All workers, great and small'.

  "This is a continuing series, students. Open your books to page 276, we will be looking at the ecology of the strangest mammal in all of Arnd. Unlike its relative the Great Sloth, the Emerald Sloth is partially aquatic, building nets and traps in clear, shallow freshwater streams. Now, students, those of you who read ahead, who can tell me what's remarquable about that?" Pause. "Yes, Mandrin?"   "They don't need to breathe?"   "That's' not quite true, they are breathing... breathing in carbon dioxide for photosynthesis, or sometimes just holding their breath, full of carbon dioxide, until their second circulatory system kicks into high gear, circulating it just under their skin for photosynthesis, producing oxygen that they recirculate throughout their bodies. It is true that they cannot conventionally drown nor starve unless they are deprived of sunlight or kept away from water. Now, unlike conventional plants, they cannot do this on land, something about their circulation system only engages when under submerged in water. Theorists submit it's possibly pressure-related. Yes, Mandrin?"   "So they can't starve or drown underwater?"   "No, but apparently they need nutrients they cannot produce themselves, while underwater, and will travel over wide areas, gathering berries, nuts, twigs, insect larva and other arthropods, and even the odd egg."