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Giant Stingray Picture: World’s Largest Freshwater Fish?

March 6th, 2009 · 9 Comments

Scientists working with the Megafishes Project tagged and released what could have been the world’s largest freshwater fish.  See the details of the catch at:

The stingray, which was not weighed, was caught by volunteer angler Ian Welch then tagged and released by project scientists working with a joint National Geographic / University of Nevada / Thai Department of Fisheries team.

Tag, release, and recapture of fish is one method biologists use to estimate fish abundance.

Tags: Giant fish facts · National Geographic · News · Project Results · Thailand · giant stingray · recreational fishing · research · science

9 responses so far ↓

  • 1 alex // Mar 12, 2009 at 2:42 pm

    the stingray isnt the worlds largest fish it is the giant mekong catfish!!!!!!!!!!!!!!!!!!!!

  • 2 Fishsiam // Mar 15, 2009 at 1:28 am

    This stingray is the largest example of this species ever caught by the Fishsiam team.
    The team has accounted for 78 different specimens in a fifteen month period.
    Whilst working with Dr.Zeb Hogan we have now tagged 18 fish which are being monitored in both the Maeklong and Ban Pakong Rivers in Thailand.

  • 3 Roger // May 22, 2009 at 9:48 am

    Since both these fish have been determined to be anadromous, would they still be in the running for the title. There are other fish that are considered for the title that are strictly freshwater.
    The arapaima of the Amazon is one. And they have some gigantic catfish (Paraiba) that reach over 10 feet and the 600+ pound range.
    The kaluga sturgeon may be a contender, but it’s found in both brackish and fresh water.

  • 4 Ian Baird // Aug 6, 2009 at 7:46 am

    Actually, there is no reason to believe that either the giant Mekong catfish or the Giant stingray are at all anadromous. Both a strict fresh water dwellers. The stingray reaches a greater weight that the catfish, so it is the largest.

  • 5 phillip // Sep 17, 2009 at 6:07 am

    thats not a sting ray

  • 6 Jonathan // Nov 19, 2009 at 11:46 pm

    Same old boring debate. Fact is noone is doing the real work required to identify the worlds largest freshwater fish. That being to set up a set of standardized tests.

    You’d thing a scientist or bioligist could figure that one out!

  • 7 Markus // Apr 11, 2010 at 4:50 am

    It would be really interesting to know if there are any confirmed weights for the freshwater stingrays. All I have seen so far were estimations. I think it is especially hard to estimated the true weight of a fish with such an unusual shape as a stingray, so I wouldn´t be surprised if the estimated weights would significiantly differ from the actual weights. So is there any giant freshwater stingray with known dates of disk diametre and total length, which was really weighed and not only estimated? Such “hard” dates would make it much easier to distinguish between big-fish-stories and possibly respectable dates.

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