This provides a uniquely clear example of how different specialists within the same species, in this case adaption to life at
different habitat depths, can be maintained even within the same geographic population.
They say this is the first evidence of natural selection maintaining separate specialised types of the same species of fish, each adapting to
different habitat depths within a single population spanning two kilometres of depth in the deep sea.
Not exact matches
Indeed, the species which evolved exhibit innumerable combinations of colours and are adapted to
different habitats, such as sandy bottoms, rocky shores or open waters — ranging from the clear shallows to the permanent darkness of the turbid
depths.