ceptopsis sp.

amiidae · Post by **amiidae** » 15 Jan 2006, 11:54

bumped into this pic. labeled "ceptopsis oliverai"

anyone has details/info like species profile, origin etc..?

thanks

ben

Post by **Silurus** » 15 Jan 2006, 13:45

It's a deepwater cetopsid from the Amazon River.

sidguppy · Post by **sidguppy** » 15 Jan 2006, 17:25

Weirdest thing I've seen in ages

Do I spot correctly it lacks eyes?
Cetopsids have minute eyes, but this one seems to be eye-less....like a cave-fish!

And it looks like a dead fish to me, preserved?

some parts of the Amazon are almost 100m deep. getting fish from deep parts for the hobby is almost (if not entirely) impossible due to pressure issues I think.....you can't dive there (too deep for SCUBA), you can't see a thing (it's not like the Riftlakes, dark and cloudy water), and hauling fish up from depths like that, will make them burst and die....

does anyone manage to catch fish at such depths and keep them alive?

It reminds me of weird fish like these:

Polynemus multifilis

Bathypterois

similar niche but in the Amazon depths?

Post by **Silurus** » 15 Jan 2006, 17:39

hauling fish up from depths like that, will make them burst and die....

I think the Amazon is not deep enough for that big a pressure differential to build up that fishes hauled up from the bottom will burst.

coelacanth · Post by **coelacanth** » 15 Jan 2006, 22:08

Silurus wrote: I think the Amazon is not deep enough for that big a pressure differential to build up that fishes hauled up from the bottom will burst.

Physoclists (are they still called that?) can encounter serious problems when brought up from surprisingly shallow depths, Perch (Perca fluviatilis) caught by angling from only 10m deep are known to really struggle when released. It's not often recorded because not that much freshwater angling in the UK takes place at those sort of depths. However we're not talking about everted intestinal tracts here or anything like that, and the fish we are talking about are physostomes AFAIK.

Waldo · Post by **Waldo** » 19 Jan 2006, 01:42

I've noticed from pictures of where some of these fish are captured that it's not necissarily deep but they have a floating silt that can make 2meters down seem like night. Also am I not right in saying that most ceptopsis sp are sensitive to and even attracted to ammonia levels where they eat carcasis? Sometimes vision can mean nothing and other senses must make up for that loss.