Reef protest to target Commonwealth Bank

Environmental activists will target the Commonwealth Bank in Adelaide as part of national campaign to convince the bank to rule out funding coal projects that could damage the Great Barrier Reef.

The group known as 350.org says dozens of bank customers will close their accounts or lodge a formal complaint with the bank as part of the action on Wednesday.

"Funding coal ports on the Great Barrier Reef would be a disaster for the reef and the climate," protest spokeswoman Lovisa Muyderman says.

A similar protest will be held in Melbourne's busy Bourke Street Mall, with more than 60 people expected to attend.