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The Colorado Aquarium Society, established in 1947,  is an open group for aquarists to share their interest in all facets of the aquarium hobby. Our members consist of advanced expert hobbyists as well as beginners and all levels between.  If you are interested in learning about the hobby, sharing your experience in the hobby, or would like to discuss any aspect of fish, invertebrates, plants, aquariums, ponds, and amphibians, The Colorado Aquarium Society General Meetings are open to the public and everyone is welcome!

The CAS was established in 1947 and incorporated under Colorado law as a non profit organization on November 6, 1962.

For a detailed review of our history go to our history page.


Saturday, October 29, 2016    
CAS Fall Auction! - New Location -
4500 E Hampden Ave
Cherry Hills Village, CO 80113

CAS Sponsor - Visit all our Sponsors Here!


Next General Meeting:

Confirmed Event
Friday, December 2, 2016    7:00pm
December General Meeting - HOLIDAY PARTY - Friday!

Sorry, this location is only visible to members. Already a Member? Go to Member Area Event List

Event Open to Members and Their Guests

Colorado Aquarium Society Annual Christmas Celebration, Friday, December 2. Pot luck, at the church, bring a dish and the family.

December Christmas Party, Pot Luck, Awards, and Gift Exchange
Our Holiday Party / Potluck for December will be held at 7:00pm on Friday December 2nd.
Anyone who can assist with set-up and
decorating, please come at 5:30

RSVP's are requested as we have to set up the room for the number attending.  Each family is requested to bring a side dish or dessert.  Club will provide Turkey, Ham and beverages.

Anyone who would like to participate in our ‘White Shark’ gift exchange should bring an un-wrapped fish related gift in a paper bag, usually a value of $10,  The unlabeled gifts are placed on a table and numbers are drawn to participate. When your number is called, you have the option to pick a new gift from the table or “steal” a gift from someone else. Once a gift has been held by the same person three times, they keep the gift and it can no longer be stolen. When all the gifts are taken from the table, each participating person will have a gift and the game is over.


Also, CAS awards will be announced and given out during the party.
The Holiday Party is open to members and their guests.
For More Information Contact CAS.
Bethany Lutheran Church
4500 E. Hampden Ave
Cherry Hills Village, CO 80113

Monthly Bowl Show:
The December Bowl Show will consist of:
The Grand Championship! All first place winners from all classes held during the year are eligible.
Remember: Only Flat Sided Containers will be accepted


Bowl Show: Grande Finale!  This bowl show will feature all of the first place winners that won throughout the year.  This includes each class as well as best of shows.  Below is the list.

 Questions and RSVP''s, call Keanne Brown or Tory Brown (log in to view phone numbers in location details) 

Dave Schieltz       Sciaichromis Freri (Ahli)
                             Copedichromis Azerus
                             Pusemagil Red Neon
                             Metralima Lombardoi
                             Odessa Barbs

Larry  Brown                 Chropae Danio
                             (2) Male Bettas
                             Fiddler Crab
                             Albino Angel
                             Percola Clowns
                             Florida Flag Fish

Terry Hannah                 Albino Corys
                             Moscow Black Velvet Guppies
                             Red Eared Slider Turtle

Darrell Clendinnen           Cyprinodon Sp. Crescant Lake
                             Fundulupanchex Gardneri Innidere

Brian Rose                   L-181 Ancistrus

Marti Connely                Male Betta

Kevin Thurston               Striated Loach
                             Marbled Headstander
                             Black Ghost
                             Moonlight Gourami
                             Synodontis Angelicus

Ben Rogers                   Koi Angel

Roman                        Yoyo Loach

Patricia Bab                 Pencil Fish

Sarah Wells                  Pearl Scale Oranda

Bowl Show

Competition Date: 12/2/2016

Remember:  Only Flat Sided Containers will be accepted.

For More Information on Bowl Show Rules, Click Here

  • Championship class. All first place winners from all classes held during the year are eligible.

Kelly Dawson Education Fund

Learn more here.

Sponsor a tank for a school!

It takes $50 for tank with fish to be maintained for a school year, however, any donation amount is appreciated.
Your Name (Optional):
Donation Amount:

Random Tip #45 - Bowl Shows
In CAS Bowl Shows, the entries are not judged against each-other. They are judged on a point system as examples of their species of fish/aquatic animal. This allows a variety of species to be fairly judged in the same show. You can view more information on Bowl Shows here.       - Webmaster
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GENERAL MEETINGS: Everyone is Welcome!

First Friday of Each Month at 7:30pm

Bethany Lugheran Church
4500 E. Hampden Ave
Cherry Hills Village, CO 80113

Get Google Map
General Meetings are held on the first Friday of every month, and feature a cash promptness award, a detailed program on a specific aspect of the aquarium hobby, a bowl show, a mini-auction, and announcements of up-coming activities.

General meetings are open to the public. We welcome guests, so please feel free to attend if you are interested in aquariums and ornamental fishkeeping.

For more details on this month's meeting, see our Meetings And Events List


The CAS encourages its members to breed and show their fish through various programs such as Bowl Shows, Grow Competitions, Aquarist of the Year, and more.  Members who place in these competitions are awarded points that are accumulated towards a number of different awards.

Learn more about CAS Competitions, Bowl Shows, and Grow Contests.


Mini-Auctions are held at the end of each General Meeting and include fish, plants, supplies, and equipment. Please note that there is a 5 item per member limit on items to be auctioned at the Mini-Auction.

Mini Auction Information:

If you did not get your labels at the meeting, and would like to pre-print labels, you can print these.
Printable Labels - Normal Items
Printable Labels - Minimum Bid Items
If you would like to print these labels, you must attach them with packing tape that covers the label completely to protect it from getting wet. Also for Minimum Bid, if your printer doesn't print the pink for minimum bid, you will need to highlight in Pink / Red after printing.

For more information on Auctions, visit our Auction Information Page.


Board Meetings are held the last Friday of each month at a member’s residence.  They are the business meetings of the CAS and are open only to members.

Members are invited and encouraged to attend. Non-board members do not have voting rights but member’s input is recognized and appreciated. It is also a great way to see other member’s aquarium setups.


Throughout the year CAS hosts a variety of educational and fun activities for its members.  Annual events may include a fish show, auctions, a Summer picnic, and the Christmas Party / Annual Awards Banquet.

In addition, other special events are held and vary each year.  Past years events have included: field trips, collecting trips, workshops, making fish food, and home (fish room) tours.

View Coming Events List


CAS holds two auctions annually: a Spring Auction and a Fall Auction. The purpose of these auctions is to generate operating revenue. Auctions are open to the public and we invite everyone to attend. Items include: bagged fish, hardware such as tanks, heaters, filters, etc., and supplies such as food and water conditioner.
For more information on Auctions, visit our Auction Information Page.

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