Is there photosynthetic activity in the benthic zone of the ocean?

Benthic zone is an ecological community found deep in the ocean. They contain phytobentos (plants), that dwell in higher levels of benthic zone, they need sunlight to carry out photosynthesis. They can be classified as microphtobenthos and macrophytobenthos. Due to photosynthesis they provide food to other consumers in benthic zone.