![Hi fin Pangasius catfish](http://www.fishtankltd.com/cdn/shop/products/456896272_a756f165-5dab-47f8-9cd4-177d9e12b542_{width}x.jpg?v=1586023534)
Rough purchase size 5-6cm.
The Iridescent Shark Pangasianodon hypophthalmus (previously Pangasius hypophthalmus) is a very active catfish. They are schooling fish, and a group of these swimmers makes a delightful display. The name is derived from its juvenile coloring, a silvery iridescence with a couple dark stripes, and a body shape resembling that of a shark. As they reach their adult size, which can be up to a whooping 4 feet (130 cm) in length in the wild, their coloring becomes a uniform darker gray, often without the striping.