A carpet and a petrol can were among the items Newquay Dive recovered from the waters during its second Dive Against Debris.
The event targeted the reef underneath the Headland and Little Fistral Beach.
During two dives in four hours the team found eight bags of rubbish weighing in at a total of 16kg.
Members of the Dive Newquay club in the UK also collected miscellaneous pieces of debris including rubber, plastics and fishing lead.
Organisers and dive instructors James Taylor and Veronika Kruse said they were pleased with the outcome.
"The numbers of divers wanting to participate has increased since the last Dive Against Debris," James said.
"We all realise how important the oceans are to us and we want to do our part in keeping them clean.
"Were incredibly thankful to everybody for coming along."
Both experienced and novice divers can get involved with Dive Against Debris. For more information about Dive Against Debris visit the Issues & Projects section of projectaware.org.