How big does the Iridescent Shark get?

Juveniles are sold at just a few centimeters, but they grow very quickly and can eventually reach up to 130 cm. Because of this, they're generally considered difficult to keep for their entire life in a typical home aquarium.

Can beginners keep this fish?

This species is rated as suitable for experienced keepers. It requires more preparation and knowledge than beginner-friendly fish, including managing its rapid growth and securing enough space for it long-term.

Can it be kept with other fish?

It's generally peaceful and considered suitable for a community tank. However, as it grows larger it may accidentally swallow smaller fish, so the size of tankmates needs careful consideration.

It's omnivorous and eats a wide range of foods, from prepared pellets to live food. Its appetite increases during the growth phase, so managing leftover food is important to prevent water quality problems.

How large a tank do I need?

A small tank is fine while it's young, but you'll need to move to progressively larger tanks as it grows. Since it can eventually reach up to 130 cm, it's important to plan ahead with plenty of room to spare.

Iridescent Shark

The Iridescent Shark (Pangasius) is a large catfish native to Southeast Asia, known for its shimmering silver body and big, expressive eyes. Juveniles start out just a few centimeters long and swim actively around the tank, which is part of their appeal. They're generally peaceful and can be kept alongside other fish, but they grow extremely quickly and eventually reach up to 130 cm in length. Because of this, they cannot be kept for their entire life in a typical home aquarium, so anyone considering one should plan ahead for a future home large enough to accommodate them. This striking, powerful swimmer is best suited to experienced keepers ready for that long-term commitment.

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About Iridescent Shark

Care guide for the Iridescent Shark (Pangasius), a large Southeast Asian catfish with a shimmering silver body that grows up to 130 cm. Learn its traits, temperament, and what to know before bringing one home.

7 things to know before welcoming a Iridescent Shark

1Grows far larger than expected
Juveniles are sold at just a few centimeters, but they grow very quickly and can eventually reach up to 130 cm. Since a typical home aquarium can't house them for their entire life, think carefully about long-term space before bringing one home.
2Needs plenty of swimming room
They're active swimmers, so they need a tank with enough length and depth to match their size as they grow. It helps to plan ahead for upgrading the tank at each growth stage.
3Best suited for experienced keepers
This species is considered suitable for experienced keepers. Managing its rapid growth, eventual large size, and water quality calls for more knowledge and experience than beginner-friendly fish.
4Shimmering body and big eyes
Its shimmering silver body and large eyes are its signature features, giving it real presence as it swims around the tank. As it grows, its body also becomes taller and more imposing in appearance.
5Peaceful, but watch tankmate size
It's generally peaceful and rarely aggressive toward other fish. However, as it grows large it may accidentally swallow smaller fish, so tankmate size needs careful consideration.
6Plan a future home in advance
Before bringing one home, it's essential to confirm you can secure a place for it once it grows large, such as a bigger tank or a specialized facility. Avoid taking in a juvenile without a clear long-term plan.
7Omnivorous and easy to feed
It's omnivorous and will eat a wide range of foods, including prepared pellets and live food. It has a hearty appetite especially during its growth phase, so remove leftover food promptly and keep up with regular water changes to prevent water quality issues.

Frequently asked questions about Iridescent Shark

Q.How big does the Iridescent Shark get?: A.Juveniles are sold at just a few centimeters, but they grow very quickly and can eventually reach up to 130 cm. Because of this, they're generally considered difficult to keep for their entire life in a typical home aquarium.
Q.Can beginners keep this fish?: A.This species is rated as suitable for experienced keepers. It requires more preparation and knowledge than beginner-friendly fish, including managing its rapid growth and securing enough space for it long-term.
Q.Can it be kept with other fish?: A.It's generally peaceful and considered suitable for a community tank. However, as it grows larger it may accidentally swallow smaller fish, so the size of tankmates needs careful consideration.
Q.What does it eat?: A.It's omnivorous and eats a wide range of foods, from prepared pellets to live food. Its appetite increases during the growth phase, so managing leftover food is important to prevent water quality problems.
Q.How large a tank do I need?: A.A small tank is fine while it's young, but you'll need to move to progressively larger tanks as it grows. Since it can eventually reach up to 130 cm, it's important to plan ahead with plenty of room to spare.