The claim that Lake Guinas is connected to Lake Otjikoto by underground caves is frequently made but not proven as yet .
Tilapia guinasana , a species of cichlid fish which naturally was only found in Otjikoto 's sister lake , Lake Guinas , was introduced to Otjikoto Lake .
The claim that Lake Guinas is connected to Otjikoto Lake   by underground caves is frequently made but not proven as yet .
Tilapia guinasana , a species of cichlid fish which naturally was only found in Otjikoto 's sister lake , Lake Guinas , was introduced to Otjikoto Lake .