Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Osteoglossocephalai
Supercohors: Clupeocephala
Cohors: Euteleosteomorpha
Subcohors: Neoteleostei
Infracohors: Eurypterygia
Sectio: Ctenosquamata
Subsectio: Acanthomorphata
Divisio/Superordo: Acanthopterygii
Subdivisio: Berycimorphaceae
Ordo: Trachichthyiformes
Subordo: Trachichthyoidei
Familia: Monocentridae
Genera: †Brazosiella – Cleidopus – Monocentris
Name
Monocentridae
References
Monocentridae and its species in FishBase,
Froese, R. & Pauly, D. (eds.) 2024. FishBase. World Wide Web electronic publication, www.fishbase.org, version 02/2024.
Genera of Monocentridae (including synonyms) in Catalog of Fishes, Eschmeyer, W.N., Fricke, R. & van der Laan, R. (eds.) 2024. Catalog of Fishes electronic version.
Vernacular names
English: Pinecone Fishes
Pinecone fishes are small and unusual marine fish of the family Monocentridae. The family contains just four species in two genera, one of which is monotypic. Their distribution is limited to tropical and subtropical waters of the Indo-Pacific. Pinecone fishes are popular subjects of public aquaria, but are both expensive and considered a challenge for the hobbyist to maintain.
Description
These fish are aptly named; their rounded, compressed bodies are completely covered (with the exception of the caudal peduncle) with very large, strong, platelike scales called scutes, which are fortified with prominent ridges.[2] The first dorsal fin is composed of four to seven strong, disunited spines which vary in length; the second dorsal fin and anal fin are small, spineless and rounded, situated far back of the convex head. The pectoral fins are somewhat elongate and the caudal fin is truncate.
Coloration is typically a yellow to orange, with the scales dramatically outlined in black. The eyes are relatively large, and the mouth is oblique and subterminal. On either side of the lower jaw is a bioluminescent organ called a photophore: a pale light is produced by symbiotic bacteria within the organ,[2] and the color of the light varies with ambient light levels—orange by day and blue-green at night.
The pineapplefish, Cleidopus gloriamaris, is the largest species, reaching up to 30 cm (12 in) in length.[2] Sexual dimorphism is not apparent.
Life history
Pinecone fishes inhabit the sublittoral zone, and are associated with ledges and caves, rocky and (occasionally) coral reefs over a hard bottom. Found at 10–200 m deep (with juveniles frequenting the shallower end of this range), pinecone fishes are nocturnal and form schools.
The photophores are thought to play a role in attracting the zooplankton upon which the fish feed; intraspecific communication may also be a use for the light.[2] Little is known of their reproductive biology, but they are assumed not to guard their brood.
References
Froese, Rainer; Pauly, Daniel (eds.). "Family Monocentridae". FishBase. October 2012 version.
Paxton, John R. (1998). Paxton, J.R.; Eschmeyer, W.N. (eds.). Encyclopedia of Fishes. San Diego: Academic Press. pp. 161–162. ISBN 0-12-547665-5.
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