Vili,
Vietnam clams was not collected right in the past and up to now.
That's why the Solomon does not feel any competition at all from Vietnam clams. Many of the divers have yet to be educated to collect it right.
Some new exporter have teach the divers to carefully remove the clams from the rock it is attach too.
You will see more clams of good quality will be coming out of Vietnam. As the quality of Vietnam clams improves, the Solomon islands will need to adjust their prices.