Cell nuclei and mitochondria are the most important scatterers. In this way, geometric phase is introduced by using anisotropic scatterers. The spatial width was about 6 times narrower with the scatterers than without. The gain medium in which the scatterers lie will allow stimulated emission to occur. A regular array of scatterers produces a regular array of spherical waves. This is possible because the scatterers increased the effective aperture of the array. Non-hyperbolic scatterers may have an arithmetic decay rate. Marbled hatchetfish are egg scatterers and have been bred in the aquarium hobby. All danionins are egg scatterers and breed in the rainy season in the wild.