Marine cichlid?

[twentyleagues]

There is a species of goby that was brought to the great lakes in bilge water from shipping vessels that is a saltwater species. Ive heard of others too. I know it doesn't answer the question but thought it was related. Also I can't find the study but I did read something years ago that said most of the African cichlids in the three major lakes directly originated in the ocean and were land locked during the last ice age.

Round Goby

 

[L3CTR0N]

In Dubai there seems to be a lot of Mozambique Tilapia and Blue Tilapia in the both freshwater lakes and dams, as well as in the ocean. I have seen both species, and what looks like hybrids of them in full freshwater and full marine, along with their fry in both freshwater and marine. All the lakes here are man made (and not connected to the ocean. They are also quite far from the ocean, so I am guessing all these tilapia have been introduced).

As I have seen the fry in both fresh water and marine, it seems like they can breed and live pretty much anywhere. They are remarkably resilient/adaptable fish.

Summer time, (now) the oceans temps here are currently 33 degrees at night when I go, and the lakes have reached up to 37 C here when I visited in the evenings.
In winter the oceans gets to 18 C (the coldest I have experienced), with the night time temps in the desert hitting 10C, and sometimes even reaching 0 C in the mountains in the north of the country. (so I imagine the lakes to be around 16 - 19C. I havent measured the water of the lakes in winter yet)

View attachment 1468384

View attachment 1468385

View attachment 1468386

View attachment 1468387

View attachment 1468388

View attachment 1468389

View attachment 1468390

I second this. I have seen tilapia swimming in the sea alongside needlefishes and mullet.

 

[Hybridfish7]

Don't quote me on this but marine angels, freshwater angels and mono angels, mono sebae seems to be very much connected on evolutionary basis.
Also the Madagascar dambe cichlids look very much like the marine parrots with their rabbit like teeth. Would have to test their dna do a evolutionary analysis for solid evidence.

Freshwater angels are cichlids.

 

[..puSkar..]

Freshwater angels are cichlids.

seriously didn't know that ?
I very well know that , that's what I'm stating, that marine angels , mono and sebaes look like they're connected to freshwater angels , but we'll need to check evolution for more evidence.
Seems like you didn't get me.
Happens sometimes ?
?

 

[Hybridfish7]

seriously didn't know that ?
I very well know that , that's what I'm stating, that marine angels , mono and sebaes look like they're connected to freshwater angels , but we'll need to check evolution for more evidence.
Seems like you didn't get me.
Happens sometimes ?
?

The way you worded it would make someone assume you are putting that out as a statement. You said, "don't quote me on this", so again, one with any ounce of grammatical sense would then assume that you are stating a fact that you are unsure of, and I was correcting you, because prefacing a statement like that opens you up to such.

 

[..puSkar..]

You said, "don't quote me on this", so again, one with any ounce of grammatical sense would then assume that you are stating a fact that you are unsure of

Yes I'm unsure of

marine angels, freshwater angels and mono angels, mono sebae seems to be very much connected on evolutionary basis.

 

[mattybecks]

Tracing Cichlids Through the Seas | Science | AAAS (sciencemag.org)

Sorry to interrupt the English lesson, but going back to fish I stumbled across this short article which ties into this thread quite well. Cichlid evolution, and the hypothesis that freshwater may have adapted to salt and spread like that. The adaptability of cichlids.

 

[mattybecks]

There is a species of goby that was brought to the great lakes in bilge water from shipping vessels that is a saltwater species. Ive heard of others too. I know it doesn't answer the question but thought it was related. Also I can't find the study but I did read something years ago that said most of the African cichlids in the three major lakes directly originated in the ocean and were land locked during the last ice age.

Round Goby

I was trying to find more information on this too, as I also remember hearing something about this. However there seems to be rather limited information on the African rift lakes once being connected to the sea.
Apparently Africa was drier in this region (the Congo rainforest used to be more like a dry savannah in the last ice age). And as we know Africa is splitting because of plate tectonics, hence the formation of the African rift lakes. This rifting stretches from the middle east (the Arabian peninsula used to be part of Africa, but this is the top of rift chain and has since split off, allowing the Indian ocean to spill in and now it is saltwater). The same will happen with the great rift lakes in millions of years to come. Apparently the reason for the high mineral content in the lakes, is because of the volcanic activity and high mineral composition of the rocks that eroded into the lakes, giving them their very hard water.

 

[mattybecks]

Weird Waters | National Geographic Society

This makes for an interesting read. Lake Turkana in Kenya. Very high alkalinity (largest alkaline lake in the world), and salinity. But almost no calcium. So no mollusks or snails. But there are a lot fish species.

 

[..puSkar..]

I was trying to find more information on this too, as I also remember hearing something about this. However there seems to be rather limited information on the African rift lakes once being connected to the sea.
Apparently Africa was drier in this region (the Congo rainforest used to be more like a dry savannah in the last ice age). And as we know Africa is splitting because of plate tectonics, hence the formation of the African rift lakes. This rifting stretches from the middle east (the Arabian peninsula used to be part of Africa, but this is the top of rift chain and has since split off, allowing the Indian ocean to spill in and now it is saltwater). The same will happen with the great rift lakes in millions of years to come. Apparently the reason for the high mineral content in the lakes, is because of the volcanic activity and high mineral composition of the rocks that eroded into the lakes, giving them their very hard water.

I knew this.
But

Weird Waters | National Geographic Society

This makes for an interesting read. Lake Turkana in Kenya. Very high alkalinity (largest alkaline lake in the world), and salinity. But almost no calcium. So no mollusks or snails. But there are a lot fish species.

This is interesting and a Good one ?