At What Age Do Fry Become Juveniles?(contains photos)

bronzefry · Post by **bronzefry** » 08 Apr 2005, 14:22

At what age do fry become juveniles?

Here's a Paleatus at appx. 6 weeks:

At 6 weeks, he/she was unable to reach the surface of the 75 gallon tank for air and had a difficult time keeping up with the others. Length: between 1/8"-1/4".

This is the same Paleatus at appx. 10 weeks of age:

At 10 weeks, he/she can get to the top of the tank with ease, and "shoals" with the others. Length: 1/2".

Do both pictures indicate a juvenile?

Does sexual maturity indicate an adult? (Silly question, but I still want to ask!)

corydoras4life · Post by **corydoras4life** » 22 Apr 2005, 23:27

i dont know if this is a juvinille or not but i live in Rhode Island and i would just like to ask,where did you get your first pygmies that layed the eggs

eupterus · Post by **eupterus** » 23 Apr 2005, 00:16

I have always been under the impression that fry are young that are still feeding from the eggsack and are yet to become free swimming, they tend to be unrecognisable and remain in large groups. The picture you have here is certainly not fry and I would consider to be juvenile.

But then thats just my opinion

Post by **Coryman** » 23 Apr 2005, 16:53

Dictionary quote Fry pl "The young of various species of fish" .

Fry are young fish from hatching up to maturity. In reality both words refer to the same thing.

Ian[/i]

eupterus · Post by **eupterus** » 23 Apr 2005, 18:02

Here is a hair please split it.
Dictionary quote FRY; to place in hot oil until cooked and crispy.
Sorry i dont mean to be flippent but in sales terms i would never by fry but juveniles often refer to young sub adult fish that may not have yet reached the adult colouration or fin array. If I miss read the post then I appologise but then I am sure that many ppl on here have dictionaries.

No offense of course

YouTube · Post by **Jools** » 23 Apr 2005, 18:04

I have a general distinction that I use on the site. Fry either look different, are yet to fully develop or are still more vulnerable than juveniles. Typically I put pics at five stages of life: eggs, fry, juveniles, sub-adult and adult.

Jools

eupterus · Post by **eupterus** » 23 Apr 2005, 18:08

Thanks jools, that was the point i was trying to make. Dictionary descriptions dont help the topic asked. I would agree with the stages you ahve suggested and also in answer to the initial post I would consider these photos to be juveniles and defiantely not fry

Mike_Noren · Post by **Mike_Noren** » 23 Apr 2005, 18:20

AFAIK "fry" is vernacular, referring to any immature fish. What Jools refers to would be more accurately called a "larva".

Ie: egg - larva - juvenile - adult.

corydoras4life · Post by **corydoras4life** » 24 Apr 2005, 18:41

actually mike jools is correct baby fish are called fry but insects are called larva

bronzefry · Post by **bronzefry** » 24 Apr 2005, 19:06

Thanks for the replies, everyone. I would think the use of the term "fry" can sometimes be too broad. As a pure coincidence, I was looking on Amazon.com and came across a text book. The subject? When do fry become adults. It's a huge tome costing close to $200.00 American. When I thought about it a bit more, the question is like asking "why is the sky blue."

cories4life: The parents are about 2-1/2 year old Paleatus from Petsmart. The female is the same in both photos:

There's another female, too. She's a bit smaller.

corydoras4life · Post by **corydoras4life** » 24 Apr 2005, 19:14

thanks and what petsmart did you get it at do you know the name of the street because im up in mass all the time

Mike_Noren · Post by **Mike_Noren** » 24 Apr 2005, 22:32

corydoras4life wrote:actually mike jools is correct baby fish are called fry but insects are called larva

Actually I am correct.
Do a google scholar search for "fish larva".

A "larva" is an early stage in development in which the animal is significantly different in morphology than the adult. The first developmental stages of Corydoras are nice examples of this, but also e.g. frogs have larvae.

A "fry" on the other hand, is an informal/vernacular term for a young fish, whether larva or juvenile.
There exist other more specific names for young fish, like "parr" and "fingerling".

bronzefry · Post by **bronzefry** » 25 Apr 2005, 14:09

All Petsmarts have a list of fish to choose from. The manager makes the choice. I asked someone working there. They are labeled as "Spotted Corydoras." This could be anything from Paleatus to something yet unnamed.

Mike, I'm learning so much. Thanks! Here's the book on Amazon that I came across:
http://www.amazon.com/exec/obidos/tg/de ... ks&n=13489

By Gordon H. Copp, Vladimir Kovac & Karol Hensel. When Do Fishes Become Juveniles?

This actually sounds like quite a topic!