The Houston outfit's shares do not meet the minimum $1 average share price requirement under the exchange's rules, Cal Dive said.

Cal Dive, which owns a fleet of 15 dive-support and pipelay vessels, has six months to regain compliance to avoid a de-listing decision.

"The company is considering its available options to regain compliance and is pursuing various strategies to satisfy the continued listing standard, including restoring investor confidence by executing on its previously-announced plan to refinance its senior secured revolving credit facility, which it expects to complete by September 30, 2014," Cal Dive said.

It