Bicolor Anthias
Pseudanthias bicolor
Also known as Yellowback Basslet, Yellowback Anthias, Bicolor Basslet
Care at a glance
- Temperature
- 72–79°F (22–26°C)
- pH
- 8.1–8.4
- Adult size
- 5.1 in (13 cm)
- Minimum tank
- 125 gal (475 L)
- Temperament
- Mostly peaceful
- Social behavior
- Social
- Swim level
- Middle
- Difficulty
- Easy
- Breeding
- Hard
- Rarity
- Common
- Reef safe
- Reef safe
- Origin
- Indo-Pacific reefs, from East Africa and Mauritius to Hawaii and the Line Islands
- Family
- Serranidae
Overview
Considered one of the easier anthias to start with, but it still has a small stomach and needs several feedings a day to hold its weight and color. It can be territorial toward its own kind and other similarly built anthias, so give it room if keeping more than one male, but it leaves corals, clams, and ornamental shrimp completely alone and is a safe reef tankmate. Best kept singly or as one male with multiple females in a tank with enough open water for it to hold a loose territory.
In the wild
Found on coastal and outer reef slopes across a wide stretch of the Indo-Pacific, usually in small groups at 5–60 m where current is strong and zooplankton is abundant. It shelters among ledges and overhangs in the rockwork and rises into open water to feed. In the aquarium it wants a large footprint of open swimming room over a rockscape with plenty of caves and an overhang or two for shade, along with brisk water movement broken up by a few calmer pockets to rest in.
Good to know
A protogynous hermaphrodite that lives in small harems: every individual starts out female, and the largest female will convert to male if the group loses its male. Males are pale violet with a yellow back that extends onto the upper tail and an elongated first dorsal spine trimmed in purple, while females are lavender with a more subdued yellow back. It is the most widely distributed species in the genus Pseudanthias, found from the western Indian Ocean to the central Pacific.
Did you know
It is the most widely ranging anthias in the genus Pseudanthias, turning up on reefs from the East African coast all the way to Hawaii, a spread far wider than any of its close relatives.
Where to buy
Some links may not be the exact species or variety.
- LiveAquaria Freshwater and saltwater fish, inverts and corals
- Saltwaterfish.com Marine fish, corals and inverts shipped overnight
…or ask your local fish store.
Appears in
Saltwater fish · Beginner fish · Reef-safe fish · Beginner saltwater fish
Keeping Bicolor Anthias?
Track water tests, reminders and stocking fit.
Related species

Lyretail Anthias
Pseudanthias squamipinnis5.1 in (13 cm)79 gal (300 L)75–81°F (24–27°C)
Huchtii Anthias
Pseudanthias huchtii4.7 in (12 cm)90 gal (340 L)75–81°F (24–27°C)
Square Anthias
Pseudanthias pleurotaenia7.9 in (20 cm)100 gal (380 L)72–79°F (22–26°C)
Evansi Anthias
Pseudanthias evansi4.7 in (12 cm)75 gal (285 L)75–81°F (24–27°C)
Purple Queen Anthias
Pseudanthias tuka4.7 in (12 cm)75 gal (285 L)75–81°F (24–27°C)
Dispar Anthias
Pseudanthias dispar3.7 in (9.5 cm)70 gal (265 L)72–79°F (22–26°C)
