Aquarium Fish

Blue Assessor Basslet

posted: 05/15/12
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Blue Assessor Basslet
Courtesy of Drs. Foster and Smith
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The Blue Assessor Basslet, also referred to as MacNeill's Mini Grouper or Macneill's Assessor Basslet, is entirely dusky dark blue. This is an excellent choice for reef aquariums.

For a single Blue Assessor Basslet, provide at least a 30-gallon tank — larger for more individuals and plenty of rock caves for hiding. Due to its aggression and being territorial, it is best to keep only one male Blue Assessor Basslet.

As a carnivore, the Blue Assessor Basslet will thrive on a diet of meaty foods such as finely chopped fresh or frozen marine fish, squid, mysid shrimp, vitamin-enriched brine shrimp, and frozen carnivore preparations. Feed at least twice a day.

Like other basslets, they are generally compatible with: Dwarf Angelfish, Large Angelfish, Anthias, Boxfish, Butterflyfish, Clownfish, Damselfish, Filefish, Goatfish, Gobies, Grunts & Sweetlips, Hawkfish, Squirrelfish and Tangs & Surgeons.

Fish Facts

Name: Blue Assessor Basslet (Assessor macneilli)

Family: Grammidae

Range: Western Pacific

Size: Up to 3 inches

Diet: Carnivore

Tank Set-up: Marine: Coral or rocks, plants

Reef Compatible: Yes

Tank Conditions: 72-78°F; sg 1.020-1.025; pH 8.1-8.4

Minimum Tank Capacity: 30 gallon

Light: Medium

Temperament: Semi-aggressive

Swimming Level: Bottom

Care Level: Moderate

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