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Why is my white fish attacking my black goldfish and making it white?

Updated On September 23rd, 2025

Pet's info: Fish | Unknown - Fish | Male | unneutered

I've recently just purchased a fancy black gold fish and this white looking fish. The white fish looks as if it is pecking at the black gold fish and now it looks like my black gold fish is white. Exactly we're the white fish is sucking at. What's going on

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on June 12th, 2017

The black fish is a Black Moor Goldfish. The white fish is a kissing gourami. It is commonly called a "kissing fish". This species of Gourami can be very territorial. What it is doing is bullying the Moor and trying to chase it away. You may need to remove one or the other. Gouramis are best kept in pairs or small groups. Consider also removing some of the plastic plants as they may injure the Moor's eyes.

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