Animals feed
Colony
A Portuguese man o’ war is a siphonophore colony made of specialized, genetically identical zooids, not a true jellyfish. Its connected components divide the work of floating, capturing prey, feeding, and reproduction.
3
Octopuses have three hearts: two supply the gills and one supplies the rest of the body. Their oxygen-carrying protein contains copper and turns blue when oxygenated.
Cubes
Wombats produce distinctly cube-like droppings, shaped inside the intestine rather than by a square opening. Research links the shape to differences in the mechanical properties of the intestinal wall.