Read this article - these fishes are preg. for 5+ years !
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sadly they are a bit rare so you can't run out and get one (i think - maybe someone is breeding them for hobbists )
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Weird 'living fossil' fish lives 100 years, pregnant for 5
The coelacanth — a giant weird fish still around from dinosaur times — can live for 100 years, a new study found. Females don’t hit sexual maturity until their late 50s, the study said, while male coelacanths are sexually mature at 40 to 69 years. Coelacanths, which have been around for 400...
news.yahoo.com
sadly they are a bit rare so you can't run out and get one (i think - maybe someone is breeding them for hobbists )