Overview

Comprehensive Description

Biology

Inhabits deep coastal drop-offs (Ref. 8631, 48635). In Java Sea, taken only in dead reef areas in somewhat turbid water (Ref. 8926). Closely related species such as P. pleurotaenia and P. bimaculatus may spawn at the same time and produce accidental hybrids (Ref. 48635).
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Distribution

Indo-West Pacific: East Africa, Maldives and Indonesia.
  • Lieske, E. and R. Myers 1994 Collins Pocket Guide. Coral reef fishes. Indo-Pacific & Caribbean including the Red Sea. Haper Collins Publishers, 400 p. (Ref. 9710)
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Indo-West Pacific: East Africa, Réunion (Mascarenes), Maldives, Indonesia, New Caledonia; probably more widespread.
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Physical Description

Morphology

Dorsal spines (total): 10; Dorsal soft rays (total): 16; Analspines: 3; Analsoft rays: 7 - 8
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Size

Maximum size: 140 mm ---
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Max. size

14.0 cm TL (male/unsexed; (Ref. 8631))
  • Kuiter, R.H. 1992 Tropical reef-fishes of the western Pacific Indonesia and adjacent waters. Gramedia Pustaka Utama, Jakarta. 314 p. (Ref. 8631)
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Diagnostic Description

Description

Inhabits deep coastal drop-offs (Ref. 8631). In Java Sea, taken only in dead reef areas in somewhat turbid water (Ref. 8926).
  • Froese, R. & D. Pauly (Editors). (2014). FishBase. World Wide Web electronic publication.
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Source: World Register of Marine Species

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Displays different or stronger color patterns when living together with similar looking species to enhance recognition by females which may lead to further speciation (Ref. 48635).Description: Characterized by juveniles with pinkish orange color with narrow magenta margins on yellow dorsal, anal and caudal fins; male with overall lavender pink color with irregular wavy band; female with orange spot on most scales of body; greatest depth of body 2.9-3.1 in SL; absence of fleshy protuberance at front of upper lip in males; slightly prolonged second and third dorsal fin spines; deeply emarginate caudal fin without filamentous tips (Ref 90102).
  • Heemstra, P.C. and J.E. Randall 1986 Serranidae. p. 509-537. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 4319)
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Ecology

Habitat

Environment

reef-associated; marine; depth range 20 - 100 m (Ref. 90102), usually 40 - 54 m (Ref. 9710)
  • Allen, G.R. and M.V. Erdmann 2012 Reef fishes of the East Indies. Perth, Australia: Universitiy of Hawai'i Press, Volumes I-III. Tropical Reef Research. (Ref. 90102)
  • Lieske, E. and R. Myers 1994 Collins Pocket Guide. Coral reef fishes. Indo-Pacific & Caribbean including the Red Sea. Haper Collins Publishers, 400 p. (Ref. 9710)
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Depth range based on 2 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 18 - 30
  Temperature range (°C): 28.664 - 28.664
  Nitrate (umol/L): 0.594 - 0.594
  Salinity (PPS): 32.613 - 32.613
  Oxygen (ml/l): 4.130 - 4.130
  Phosphate (umol/l): 0.359 - 0.359
  Silicate (umol/l): 5.009 - 5.009

Graphical representation

Depth range (m): 18 - 30
 
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Depth: 28 - 54m.
From 28 to 54 meters.

Habitat: reef-associated.
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Conservation

Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest; aquarium: commercial
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Wikipedia

Pseudanthias bimaculatus

Pseudanthias bimaculatus is a tropical fish with the common names two-spot basslet, twospot or twinspot anthias and bimac anthias. It is lesser known as the purple goldie.

Appearance[edit]

They are a medium-sized anthias reaching a maximum of 5in/12cm at adulthood. This species is sexually dimorphic, meaning the males and females have differing physical characteristics. Pseudanthias bimaculatus males are primarily red with jagged pink lines along the body. Males will have a red tail with clear to white tips. Males will typically have yellow highlights on the tail, anal fins, and head area. Males also have one or two spots on their dorsal fin, hence the scientific name 'bimaculatus', meaning two spots. Females will be primarily pink with yellow fins and tail. Females will typically have a yellow line stretching across the head through their eyes.

Diet[edit]

Pseudanthias bimaculatus are primarily carnivorous. The diet composing mainly of zooplankton and floating filamentous algae in the wild. In the aquarium, a varied diet of mysis shrimp, vitamin-enriched brine shrimp, frozen preparations and other meaty items for zooplankton feeders. Multiple small feedings throughout the day are recommended for this species.

Range[edit]

It is found in various reefs of ranging in the Indo-West Pacific from East Africa, Maldives, and Indonesia. It is a deep water species typically found in coastal drop-offs.

In the Aquarium[edit]

Pseudanthias bimaculatus do well when kept in an aquarium over 70 gallons. It is a deep water species that seems to do well when several hiding places are made available. It is considered a moderately difficult fish to care for and reef compatible.

Like other anthias species, Pseudanthias bimaculatus share the trait of being hermaphroditic. If a dominant male perishes, the largest female of the group will often morph to take its place.

They are peaceful aquarium inhabitants and will rarely bother their tankmates. The only exception seems to be males of the same species. This species may also be aggressive to other anthiae species. They are generally considered safe with any invertebrates. Possible tankmates include clownfish, blennies, gobies, Chromis, and butterflyfish.

External links[edit]

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