Overview

Comprehensive Description

Biology

Found in caves and under ledges of rocky, occasionally coral-reef habitats (Ref. 9710). Also in muddy substrates (Ref. 9563).
  • Randall, J.E., G.R. Allen and R.C. Steene 1990 Fishes of the Great Barrier Reef and Coral Sea. University of Hawaii Press, Honolulu, Hawaii. 506 p. (Ref. 2334)
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Distribution

Easten Indian Ocean to Western Pacific: Australia.
  • Hoese, D.F., D.J. Bray, J.R. Paxton and G.R. Allen 2006 Fishes. In Beasley, O.L. and A. Wells (eds.) Zoological Catalogue of Australia. Volume 35.2 Australia: ABRS & CSIRO Publishing, 1472 p. (Ref. 75154)
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Australia: Queensland and New South Wales (eastern population) and Western Australia.
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Physical Description

Morphology

Dorsal spines (total): 5 - 7; Dorsal soft rays (total): 12; Analspines: 0; Analsoft rays: 11 - 12
  • Randall, J.E., G.R. Allen and R.C. Steene 1990 Fishes of the Great Barrier Reef and Coral Sea. University of Hawaii Press, Honolulu, Hawaii. 506 p. (Ref. 2334)
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Size

Maximum size: 220 mm SL
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Max. size

22.0 cm SL (male/unsexed; (Ref. 2334))
  • Randall, J.E., G.R. Allen and R.C. Steene 1990 Fishes of the Great Barrier Reef and Coral Sea. University of Hawaii Press, Honolulu, Hawaii. 506 p. (Ref. 2334)
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Diagnostic Description

Scale modified as armor of bony scutes; pale yellow to whitish with conspicuous black outlines on scales forming a network pattern; a pale luminescent organ on the side of lower jaw.
  • Randall, J.E., G.R. Allen and R.C. Steene 1990 Fishes of the Great Barrier Reef and Coral Sea. University of Hawaii Press, Honolulu, Hawaii. 506 p. (Ref. 2334)
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Ecology

Habitat

Environment

reef-associated; marine; depth range 6 - 200 m (Ref. 9563)
  • May, J.L. and J.G.H. Maxwell 1986 Trawl fish from temperate waters of Australia. CSIRO Division of Fisheries Research, Tasmania. 492 p. (Ref. 9563)
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Depth range based on 3 specimens in 1 taxon.
Water temperature and chemistry ranges based on 2 samples.

Environmental ranges
  Depth range (m): 65.8 - 150
  Temperature range (°C): 14.724 - 23.278
  Nitrate (umol/L): 2.380 - 2.926
  Salinity (PPS): 35.488 - 35.493
  Oxygen (ml/l): 4.230 - 5.557
  Phosphate (umol/l): 0.242 - 0.308
  Silicate (umol/l): 1.453 - 2.041

Graphical representation

Depth range (m): 65.8 - 150

Temperature range (°C): 14.724 - 23.278

Nitrate (umol/L): 2.380 - 2.926

Salinity (PPS): 35.488 - 35.493

Oxygen (ml/l): 4.230 - 5.557

Phosphate (umol/l): 0.242 - 0.308

Silicate (umol/l): 1.453 - 2.041
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Depth: 6 - 200m.
From 6 to 200 meters.

Habitat: reef-associated. Found in caves and under ledges of rocky, occasionally coral-reef habitats (Ref. 9710). Also in muddy subatrates (Ref. 9563).
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Cleidopus gloriamaris

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 9
Species With Barcodes: 1
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Conservation

Threats

Not Evaluated
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest; aquarium: commercial
  • Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott 1991 World fishes important to North Americans. Exclusive of species from the continental waters of the United States and Canada. Am. Fish. Soc. Spec. Publ. (21):243 p. (Ref. 4537)
  • Randall, J.E., G.R. Allen and R.C. Steene 1990 Fishes of the Great Barrier Reef and Coral Sea. University of Hawaii Press, Honolulu, Hawaii. 506 p. (Ref. 2334)
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Wikipedia

Pineapplefish

Pineapplefish off Fly Point, New South Wales

The pineapplefish, Cleidopus gloriamaris, is a species of fish in the family Monocentridae, and the sole member of its genus. It is also known as the knightfish or the coat-of-mail fish, due to the armor-like scales covering its body, and the port-and-starboard light fish, as it has a pair of bioluminescent organs that are reminiscent of navigation lights on ships.[1] Its specific epithet is from the Latin gloria and maris, meaning "glory of the sea".[2]

Distribution and habitat[edit]

The pineapplefish is native to coastal waters off Queensland, New South Wales, and Western Australia.[3] It occurs at a depth of 6–200 meters (20–656 ft) in reefs and harbors.[4]

Description[edit]

Two pineapplefish at the Sydney Aquarium.

The pineapplefish grows up to 22 cm (8.7 in) long.[4] It has a plump, rounded body almost completely covered in large, rough scales with sharp, backward-pointing spines. The head is large, with mucous pits bordered by rough ridges, and is armored with heavy bone. The snout is blunt and overhangs the wide mouth. The teeth are tiny and thin, present on the jaws, palatine, and vomer.[2][3] There are two pits containing bioluminescent bacteria on the lower jaw near the corners of the mouth, which are concealed when the mouth is closed.[5] This photophore is green in young fish and becomes more red as it ages.[6] The first dorsal fin consists of 5-7 strong spines; the spines are free of a membrane and point alternatingly left and right. The second dorsal fin contains 12 soft rays. Each pelvic fin contains an enormous spine, nearly as long as the head, and 3-4 rudimentary rays. The pelvic spine can be locked erect at a right angle to the body. The anal fin contains 11-12 rays and the pectoral fins 14-15 rays.[2][4]

The scales of the pineapplefish are yellow to whitish with black rear margins, forming the striking pattern that gives this fish its name. The lips, chin, and parts of the jaw are black. There is a red stripe on the lower jaw running to the photophore.[3] This species is very similar to the pinecone fishes of the genus Monocentris, and is placed within that genus by some authors. Cleidopus differs from Monocentris in having a narrow preorbital bone and in the position of its light organs, which are near the tip of the lower jaw in Monocentris.[5] This species also differs from the Japanese pineapplefish (Monocentris japonica) in having a more rounded snout.[6]

Biology and ecology[edit]

Due to its small fins and rigid armor, the pineapplefish is a weak swimmer.[2] A nocturnal species, it may be found inside caves and under rocky ledges during the day.[7] In the Fly Point Halifax Park Aquatic Preserve, New South Wales, a small group of pineapplefish has been documented under the same ledge for at least 7 years, and another group under a different ledge for 3 years.[8] At night, this species ventures out onto sandy flats to feed, using its light organs to illuminate small shrimp. The light may also be used to communicate with conspecifics.[7] The light of the pineapplefish is produced by symbiotic colonies of the bacteria Vibrio fischeri within its photophores.[9] V. fischeri are also found free-living in sea water and are naturally released from the pineapplefish's photophores. However, their luminescence dims within a matter of hours after being released.[10] This species has lived up to 10 years in captivity.[8]

Relationship to humans[edit]

The pineapplefish is moderately common in deep water, but due to its retiring nature, for some time after its initial discovery it was only known from specimens tossed ashore by storms.[3] This fish is sometimes collected by commercial trawlers, and is popular with saltwater fish aquarists.[1][7] It is fairly hardy, but must be provided with rocky hiding places and live food.[11]

The species is not targeted by any fisheries, but is often taken as bycatch by commercial trawlers.[12]

References[edit]

  1. ^ a b Burgess, W. and Axelrod, H.R. (1973). Pacific Marine Fishes (second ed.). T.F.H. Publications. ISBN 0-87666-123-1. 
  2. ^ a b c d Ogilby, J.D. (1900). "Contributions to Australian Ichthyology". The Proceedings of the Linnean Society of New South Wales For the Year 1899. F. Cunninghame & Co. 
  3. ^ a b c d Wheeler, A. (1985). The World Encyclopedia of Fishes. Macdonald & Co. (Publishers) Ltd. ISBN 0-356-10715-9. 
  4. ^ a b c Froese, Rainer and Pauly, Daniel, eds. (2009). "Cleidopus gloriamaris" in FishBase. March 2009 version.
  5. ^ a b Smith, J.L.B., M.M. and Heemstra, P. (2003). Smiths' Sea Fishes. Struik. ISBN 1-86872-890-0. 
  6. ^ a b McGrouther, M. (November 2004) Pineapplefish, Cleidopus gloriamaris. Australiam Museum Fish Site. Retrieved on March 13, 2009.
  7. ^ a b c Burke, D. (2005). The Complete Burke's Backyard: The Ultimate Book of Fact Sheets. Murdoch Books. ISBN 1-74045-739-0. 
  8. ^ a b Harasti, D. Pineapple Fish (Cleidopus gloriamaris). The Underwater Photo Gallery - Dave Harasti. Retrieved on March 13, 2009.
  9. ^ Fitzgerald, J.M. (March 1977). "Classification of luminous bacteria from the light organ of the Australian Pinecone fish, Cleidopus gloriamaris". Archives of Microbiology 112 (2): 153–156. doi:10.1007/BF00429328. 
  10. ^ Nealson, K.M., Haygood, M.G., Tebo, B.M., Roman, M., Miller, E. and McCosker, J.E. (March 1984). "Contribution by Symbiotically Luminous Fishes to the Occurrence and Bioluminescence of Luminous Bacteria in Seawater". Microbial Ecology 10 (1): 69–77. doi:10.1007/BF02011596. 
  11. ^ Pineapple fish - Cleidopus gloriamaris. Aquariums Life. Retrieved on March 13, 2009.
  12. ^ Bray, Dianne. "Australian Pineapplefish, Cleidopus gloriamaris". Fishes of Australia. Retrieved 14 September 2014. 
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