The Northwest Arkansas Aquarium Society is an organization formed to bring together the aquarist community in Northwest Arkansas and the Ozark region. Our members range from new hobbyists to long time breeders, and we keep a large variety of fishes.

Come to a meeting! Learn about fish and make friends with fellow hobbyists.

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Our nwaas.com website is free for use by all aquarists, even those who are not members of our in-person club. Please consider donating to us to help defray the costs of maintaining the domain and server for everyone. The transaction is secure.

To join or renew membership, please use the "Join or Renew" button elsewhere on this page.

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Support Your Local Pet Shop

NWAAS is extremely grateful to the local shops that let us post our meeting announcements in their stores. Support your local pet shop!

Seafari logo Seafari
Rogers, AR

Worlds Under Water logo Worlds Under Water
Fayetteville, AR

Petco logo Petco
Fayetteville, AR

Rogers, AR

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Fayetteville, AR

Rogers, AR

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Rogers, AR

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  • Featured Fish
  • Red-belly Pacu (Piaractus brachypomus)

    Red-belly Pacu

    Vital Statistics




    Origin: South America, Amazon and Orinoco river basins

    Size: 36 inches

    Temperament: peaceful, but may grow large enough to eat tankmates

    Sociability: schooler, but single specimens fare well

    Breeding: egglayer

    Sexing: females are heavier bodied

    Diet: omnivorous: fruits, nuts, fish

    Water Chemistry: pH 4.8–6.8; dH 4–15

    Temperature: 72–82°F


    Above: red belly pacu, 9-inch juvenile

    The red-belly pacu is a relative of the piranha, but is a much more peaceful fish. In fact, it is delightfully friendly. In the wild, this fish is primarily an herbivore, eating fruits and nuts that fall into the water and aquatic plants. But they also happily eat fish, insects, and other foods. In any case, this fish grows to three feet, so it eats lots of whatever is offered. Juveniles resemble the red-belly piranha. They have large spots against a silver background, and a flush of orange on the chest. With age, the spots disappear to be replaced by a gray metal background.

    Stores often sell cute little babies of this fish to unsuspecting hobbyists. These youngsters quickly grow into giants that crowd the aquarium. Extra frequent, large water changes are necessary to maintain good water quality.

    WARNING! Hobbyists who purchase the red-belly pacu should be aware that there is little outlet for them when they outgrow your tank. Stores do not want or have room for them, nor do public aquariums. NEVER EVER RELEASE YOUR FISH INTO THE WILD! They can decimate local fish and it results in laws that outlaw the aquarium hobby! Unwanted pacus should be given away, sold, destroyed, or eaten. They are very popular food fish in South America!

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Join the Club or Renew Membership (Pay Dues)

The Northwest Arkansas Aquarium Society is not just a free online forum. We are a REAL aquarium society! We meet in person every month to talk about fish.

Click HERE to view the benefits and details of NWAAS membership. New members can use that page to join our society. Existing members can use it to renew membership.
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2015 Program Schedule

FEB 14th
“Killifishes Overview”
Michael Gaines

MAR 14th
“Freshwater Shrimp”
Sarah Hale

APR 11th
“Fishes of the Maya”
Rusty Wessel (KY)

MAY 9th
NWAAS 2015
Spring Auction

JUN 13th
“Mini Talks & DIY”
Multiple Speakers

JUL 11th
Club Picnic
Location TBA

AUG 8th

SEP 12th
Livebearers - No longer Child's Play
Greg Page (CO)

OCT 10th
Lake Victoria Cichlids
Greg Steeves (TX)

NOV 14th
Election of 2016 Officers
DEC 12th
Christmas Party

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