Complex sentence: The Tanganyika killifish ("Lamprichthys tanganicanus") is a species of poeciliid endemic to Lake Tanganyika, where it forms large schools, mainly close to rocky shores but also pelagically off shore.
Split into simpler sentences: The Tanganyika killifish ("Lamprichthys tanganicanus") is a species of fish in the Poeciliidae family. It is endemic to Lake Tanganyika, where it forms large schools, mainly close to rocky shores but also pelagically off shore.