Harlequin Bass – Serranus tigrinus
The Harlequin Bass, also known as the Harlequin Basslet or Tiger Bass, is a vibrant and visually striking species ideal for saltwater marine aquariums.
With an elongated body and a white base, this small fish features bold black stripes and spots that create a dynamic and eye-catching appearance. It is a popular choice for aquarists seeking a colorful and active addition to their reef or live rock setups.
| Specifications |
|---|
| Scientific Name: Serranus tigrinus |
| Size: Up to 4 inches (10 cm) |
| Color Pattern: White base with black stripes and dots |
| Common Names: Harlequin Bass, Harlequin Basslet, Tiger Bass |
FAQ
What is the ideal tank size for a Harlequin Bass?
A minimum tank size of 30 gallons is recommended to provide adequate space for swimming and to maintain stable water conditions.
Is the Harlequin Bass compatible with other marine fish?
Yes, it generally coexists well with other non-aggressive, peaceful marine species such as gobies, blennies, and small angelfish, provided the tank has sufficient hiding spots and space.
How long does a Harlequin Bass typically live in captivity?
With proper care, Harlequin Bass can live up to 8 years in a well-maintained marine aquarium.

Jan Vance –
The Harlequin Bass is a stunning addition to my 55-gallon tank. Its bold black and white pattern really stands out among the other fish. It’s active but not aggressive and enjoys the live rock areas. Easy to care for once the water parameters are stable.
Alexandra Allan –
I’ve had this fish for six months now and it’s still vibrant and active. It doesn’t eat much and seems to be adjusting well to the tank. The black spots are very noticeable and add a lot of visual interest.
Adrian Parsons –
This fish is a real eye-catcher. It moves gracefully through the tank and interacts with the coral structures. I didn’t expect such a lively and colorful fish in a small setup. Very satisfied with the purchase.