Silver Dollars: Metynnis argenteus vs. Metynnis hypsauchen - Tropical Fish Keeping - Aquarium fish care and resources
 
LinkBack Thread Tools
post #1 of 5 Old 04-13-2011, 02:46 PM Thread Starter
Member
 
fashionfobie's Avatar
 
Silver Dollars: Metynnis argenteus vs. Metynnis hypsauchen

Metynnis argenteus vs. Metynnis hypsauchen

I am still a little unsure the difference between these two species. I have researched lots of sites and I am still finding conflicting information. I did read the information on this site as well but I would like to know more.

Does Metynnis argenteus have the red anal fin ?

How do you distinguish the difference when they are young? or is the color present throughout its life?

I seem to prefer the fish with the splash of red but considering how frequently these guys are labeled incorrectly I want to be 100% sure of what I am getting.

I have a 55 gallon set up and I know these are what I want. I find them so adorable and beautiful, the prefect combo. I am planning on getting 5. My tank is about 3 years old and I have really been pondering where I want to go with it. I have a school of 6 Panda Corydoras keeping the up the place :) The big delay is probably due to the fact that I have always had a soft spot for pacu, but they are not really appropriate for me since they will get so large and need a multi hundred gallon tank. These silver dollars, being relatives of pacu, seem like a perfect choice for me and I am very anxious for more feed back on distinguishing the difference between these two species.

Thank you very much,
Natalie
fashionfobie is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 04-13-2011, 06:51 PM
Member
 
Byron's Avatar
 
The distinguishing feature (the shoulder patch) between these two species is mentioned in the first paragraph under "Discussion" in our profile of Metynnis hypsauchen, and there is a photo of each species.

The red colour of the anal fin is sometimes, but not always, present in males of Metynnis argenteus. I note it is present in the fish in the photo in the profile.

I don't know how mature the fish has to be before the shoulder patch is noticeable, but I would expect it to be darker in young fish. If anyone here has maintained this species, perhaps they could comment.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]

Last edited by Byron; 04-13-2011 at 07:02 PM.
Byron is offline  
The Following User Says Thank You to Byron For This Useful Post:
fashionfobie (04-13-2011)
post #3 of 5 Old 04-13-2011, 07:22 PM Thread Starter
Member
 
fashionfobie's Avatar
 
Thank you for your post, I missed that bit about shoulder patch. I am very happy to find out that both have the potential to present the red anal fin. I found a breeder who works with Metynnis hypsauchen. I am very excited to prepare my tank. Java Fern and Anubias here we come ;)

Again thank you,

Natalie
fashionfobie is offline  
post #4 of 5 Old 04-13-2011, 07:57 PM
Member
 
Byron's Avatar
 
Quote:
Originally Posted by fashionfobie View Post
Thank you for your post, I missed that bit about shoulder patch. I am very happy to find out that both have the potential to present the red anal fin. I found a breeder who works with Metynnis hypsauchen. I am very excited to prepare my tank. Java Fern and Anubias here we come ;)

Again thank you,

Natalie
Just to clarify, I believe the "possible" red anal fin in the male is only in M. argenteus. B.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
Byron is offline  
post #5 of 5 Old 04-13-2011, 08:06 PM Thread Starter
Member
 
fashionfobie's Avatar
 
wow I seem to be mis-computing today. I will blame it on my french mind
fashionfobie is offline  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Silver dollars yippee Characins 17 11-16-2009 08:16 PM
silver dollars different types, sizes brcacti Characins 4 10-26-2009 09:36 PM
help with silver dollars please billy111 Freshwater and Tropical Fish 1 07-02-2009 01:30 PM
Silver dollars. Follow It Home Characins 3 08-17-2007 10:33 PM
Silver Dollars - what a disaster. MattD Characins 20 08-11-2007 11:18 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome