how big do long nose gars get compared to floridas??

Lepisosteus

Potamotrygon
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May 20, 2014
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24” for a Florida in captivity is a fairly common maximum. I would say 30”-36” for a longnose.
 
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Chicxulub

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How big of a tank do you have? LNG are slow growing, but can get quite large. 2-3 adults are fairly common in the wild, with 4-5' specimens well accounted for.

With a sufficiently large tank (8x4 or so), you could keep this guy basically forever, especially if it's a male as they don't get as large.

Really it's hard to answer correctly without knowing everything about the situation
 
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