Simplify the following text for a Grade 8 native English-speaking person.
Original: The Vampire Squid is an extreme example of a deep-sea cephalopod , thought to reside at aphotic ( lightless ) depths from 600-900 metres ( 2,000-3 ,000 feet ) or more .
Simplified: The Vampire Squid is an extreme example of a deep-sea cephalopod . People think it lives at aphotic ( lightless ) depths from 600-900 metres ( 2,000-3 ,000 feet ) or more .