Expect record-high prices for lump crab to remain into the fall, as strong demand and lack of supply combine to create problems for buyers.

One lump crab seller says supply issues in Indonesia, a major supplier, are pressuring the market.  Raw material volume is down about 35 percent this year.

“That is going to put a real strain on what is going on through September,” the executive said.

As a result, prices for blue-swimming crab show no signs of declining, and are up more than 20 p…