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The aquarium guide listed the manatee as "Antillean manatee" a term that was new to me since I had heard it only referred to as the West Indian Manatee Trichechus manatus.
They also had three catfish species in the tank
South American Red Tailed Catfish Phractocephalus hemioliopterus
Reticulated Shovelnose catfish Pseudoplatystoma reticlatum
The aquarium guide listed the third as "Fork-snouted" catfish. I couldn't find any further information about it and made the assumption they are referring to the Ripsaw catfish Oxydoras niger
as shown in the photo below.
Another species in the tank is the "Brown stingray" - at least that's what it said in the aquarium guide. But after looking closer at the photo in their guide book and then at the photo below I decided it is an Ocellate river stingray Potamotrygon motoro. Though I must add that this not my field of expertise.
|The stingray is partially covered by the visitor's head|
with an introduction on how to keep freshwater stingrays
I also saw a few black-banded leporinus Leporinus fasciatus
|This is a file from the Wikimedia Commons.|
And finally, the Arrau turtle Podocnemis expansa is sharing the pool with the manatees.
From above the manatee pool looked like this:
In both photos above you can see a manatee to the left of the island.
The island is home to Saki monkeys and Emperor tamarins.
Many birds are "flying freely from the island in the River exhibit to the top of the seven-story structure" - to quote the guide.
I just want to list a few here:
Southern yellow grosbeak
Andean cocks-of-the-rock Rupicola peruvianus
and various toucan species.
I also saw several species of waterfowl in the pool. The guide lists:
Ringed teal, Rosy-billed pochard and White-faced whistling duck
|Here a shot from the underwater window with two ducks bobbing in the water|
The photo below shows a huge waterfall. I was once told by a marine mammal curator that his manatees were stressed when introduced to a new exhibit due to a life support return pipe that was placed one meter above the pool surface (3 feet) and emptied with a lot of noise.
At The Dallas World Aquarium the animals not only have the water of a return pipe gushing into the pool, as you can see in one of the above water photos, but also a tall waterfall. Neither of the two animals seems to be particularly stressed and they were calmly swimming circles through the pool. But again, I'm a designer and this is not my field of expertise.
|notice the tall aerial roots hanging behind and alongside the waterfall|
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