Натрон
Alcolapia alcalica, the common Natron tilapia or soda cichlid, is an endangered species of fish in the family Cichlidae. It is endemic to the hypersaline, warm Lake Natron, its drainage and the Shombole Swamps in Kenya and Tanzania. This species typically has an essentially terminal (straight) mouth, but a morph with an upturned mouth is found locally in eastern Lake Natron, where it co-occurs with the normal morph. "A. latilabris" and "A. ndalalani", the two other species in Lake Natron, both have a clearly downturned mouth. Territorial males of "A. alcalica" have extensive blue-white spotting, and their underparts and throat can be yellow or white. Females and non-territorial males are overall sandy in colour. "A. alcalica" reaches up to in total length.