One of the smartest creatures doesn't even have a brain. These are slime molds.
Encounter with a Slimy Stingray at the Beach ...
The slime also helps banana slugs move—and simultaneously ... They eat detritus (dead organic matter), including fallen leaves and plants, animal feces, moss, and mushroom spores, and then ...
Image: NOAA Okeanos Explorer Program, NOAA Photo Library Hagfishes are unusual animals before slime even comes into the equation. But it is this snot-like substance that they are probably best known ...