Approximately 3 5 million years ago the Isthmus of Panama

Last updated: 2/5/2023

Approximately 3 5 million years ago the Isthmus of Panama formed This new landmass severed the connection between the Pacific Ocean and the Caribbean Sea An ancestral fish population porkfish was split in two by this event the two populations no longer interbreed and are two distinct species This type of speciation is called 1 parapatric speciation 2 allopatric speciation 3 sexual selection due to ecological variation 4 hybridization 5 sympatric speciation