Pseudochromis fridmani PSEFRI-080896-MOEMAR-001

This entry was posted on Thursday, August 8th, 1996 and is filed under Dottybacks, Spawning Reports.

The Breeder’s Registry© Information contained in this report is taken from submitted observations from aquarist unless noted otherwise (see comments). Information may be reproduced providing the Breeder’s Registry is cited.

Breeder ID: PSEFRI-080896-MOEMAR-001

Date received: 8/8/96

Identification: Pseudochromis fridmani (Klausewitz, 1968)

Geographic origin: Red Sea

Taxonomy: (after I.C.Z.N.)

Kingdom Animalia

Phylum Chordata Subphylum Vertebrata

Class Osteichthyes Superorder Teleostei

Order Perciformes Suborder Percoidei

Family Pseudochromidae

Genus Pseudochromis

Species fridmani (Klausewitz, 1968)

Duration (yr): .9

Size (mm): 60

Duration (yr): .9

Size (mm): 50

Physical differences: Male is slightly larger with elongated caudal rays. Female has rounder abdomen. No color dimorphism

Adult diet: Shaved frozen shrimp, flake food, wild zooplankton, fed 2 – 3 times per day

Pre-spawning activity: Male used deep (100 mm) “den” in rock. Actively courts female with “leading” behavior.

Time spawning began: Daytime, afternoon

Area spawning occurred: Inside den (hole)

Frequency of spawning: every 6 days

Egg description: Small egg “ball” 20 mm across

Approximate quantity: ~1000

Size: 0.6 mm

Egg changes / development: Not observed

Incubation period: 4 days

Time hatching occurred: 30 – 45 minutes after dusk

Size of hatching larvae:2.5 mm

Yolk sac present?: Yes

Newly hatched appearance: small and transparent. Strongly attracted towards light (phototaxic)

Transfer / removal method: Siphoned into larval rearing tank

Spawning tank size (liter): 75

Sides of tank covered? Yes, green algae

Lighting & photo period: 2 – 4 o watt fluorescent, 13 hours

Filtration: Central system, mechanical and biological

Additives and dosages: calcium and iodine

Water temperature (F): 78-82 F

Specific gravity: 1.026

pH: 8.0

Nitrate: none detected

Fry development / changes: Growth slow at first. Metamorphosis 22 – 32 days. 25 mm at 25 days

First food offered: rotifers enriched with Selcon®, 2 – 3 times per day

Second food offered: Wild plankton at day 3


1st week(%): 50%

2nd week: 20%

3rd week: varies

Rearing tank size (liter): 25

Sides of tank covered? Black

Lighting & photo period: fluorescent bulb 7 inches from surface. 13 hours

Filtration: none, water change three times during larval period

Additives and dosages: Streptomycin at day 1. 60 mg/gal

Water temperature (F): 78 – 82 F

Specific gravity: 1.026

pH: 8.0

Nitrate: none detected

Comments: High mortalities first three days. First described by Klausewitz in Senckenb Biol. v. 49 (no. 6);1968:444, Figs. 1-3. From specimens collected at a coral reef south of Eliat, Gulf of Aqaba, Red Sea.

Word origin: The genus Pseudochromis is from the Greek roots pseud, -o meaning false; and chrom, =a, -ato, -o, meaning color. The species fridmani has no Latin or Greek roots and is believed to be a reference to an individual. The genus literally means “false color” and is a reference to the brilliant colors of many of the species of this family.

About this report: Information contained in this report is taken from submitted observations. Taxonomy, Synonomy, Original description , Word origin and Suggested reading are provided by member(s) of The Breeder’s Registry staff. Information is presented under the belief that it is accurate. If you have information in addition to, or contrary to that presented you are encouraged to contact the Breeder’s Registry. Permission is granted for “one-time” personal use. Reproduction as distributed or accessible media is prohibited without prior written permission. All rights reserved. 1996

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