Fish
Croaking Gourami
Trichopsis vittata · also called croaking gouramis
A faint croaking sound rises from the water’s surface as a male croaking gourami vibrates muscles against his own fin rays, one of the few aquarium fish capable of producing a genuinely audible noise during courtship and territorial disputes.
Overview
The croaking gourami, Trichopsis vittata, is native to still and slow-moving fresh water across Southeast Asia. Its unusual sound-producing ability, air-breathing labyrinth organ, and bubble-nest building behaviour make it one of the more acoustically distinctive small fish kept in freshwater aquariums.
A fish you can actually hear
While many fish communicate through colour, posture, or movement, the croaking gourami adds genuine sound to its repertoire, producing an audible croak that plays a real role in both courtship and settling disputes with rivals.
Status
Not Evaluated for conservation status, widespread across suitable freshwater habitat throughout Southeast Asia.
Croaking Gourami: common questions
How does the croaking gourami make sound?
It produces a distinct croaking noise by vibrating specialised muscles against the rays of its pectoral fins, a sound-making method shared with its close relatives in the genus Trichopsis.
When does the croaking gourami make its sound?
Mainly during courtship displays toward potential mates and during territorial disputes with rival males, making the sound an important part of its social communication.
How does the croaking gourami breathe in low-oxygen water?
It has a specialised labyrinth organ that lets it gulp air directly at the surface, allowing it to survive in warm, still, oxygen-poor water where many other fish would struggle.
What kind of nest does the croaking gourami build?
Males build a floating nest made of mucus-coated bubbles at the water's surface, where the eggs are kept until they hatch.