
American Paddle Fish - Polyodon spathula
American Paddle Fish - Polyodon spathula seen at Singapore River Safari.
It doesn't looks like this Paddle Fishes are meant to be kept in aquarium, all of them have 'damages' at the tip of their Paddle, probably constantly 'knocking' onto the walls/barriers that houses them.

The American paddlefish is a species of basal ray-finned fish closely related to sturgeons in the order Acipenseriformes. Fossil records of paddlefish date back over 300 million years, nearly 50 million years before dinosaurs first appeared.
Similar species: Sturgeons And Paddlefishes
By Albert Kang
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Uploaded Aug 3, 2017. Captured Jul 16, 2013 12:14 in 80 Mandai Lake Rd, Singapore 729826.
comments (2)
They are very primitive fish and now only 2 species can still be found, the other one is from China, which is listed as endangered. 4 more species are known only from fossil records. Posted 8 years ago