NEW YORK ( TheStreet) -- Odyssey Marine Exploration (Nasdaq: OMEX) is trading at unusually high volume Wednesday with 3.4 million shares changing hands. It is currently at 4.5 times its average daily volume and trading down $1.30 (-40.1%) at $1.94 as of 1:50 p.m. ET. Odyssey Marine has a market cap of $220.6 million and is part of the services sector and diversified services industry. Shares are up 16.5% year to date as of the close of trading on Tuesday. Odyssey Marine Exploration, Inc. engages in the exploration and recovery of deep-ocean shipwrecks worldwide. The company sells coins, artifacts, and merchandise, as well as leases its themed attraction exhibit and expedition charters. It sells coins and artifacts through dealers. TheStreet Ratings rates Odyssey Marine as a sell. The company's weaknesses can be seen in multiple areas, such as its generally weak debt management, disappointing return on equity, weak operating cash flow and feeble growth in its earnings per share. You can view the full Odyssey Marine Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are falling on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVDOWN to 95370 or select from multiple alert options.