Canthigaster valentini   (Bleeker,  1853) (Fish)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Chordata
Class: Actinopterygii
Order:Tetraodontiformes
Family:Tetraodontidae

Image copyrights: Randall, J.E.

Description
Size: 11.0 cm TL (male)

Color: Side with two prominent dark bars extending to belly.

Dorsal spines (total): 0; Dorsal soft rays (total): 9; Anal spines: 0; Anal soft rays: 9.

Dioecious, external fertilization, nonguarders, open water/substratum egg scatterers. Social and mating systems of this species are based upon female territoriality where polygyny results from males defending females occupying a certain territory (female-defense polygyny). All sexually mature females are territorial females. Neither parent guards the eggs which are laid in a nest located in the female's territory. During breeding, territorial females perform the 'caudal flexing with swollen abdomen display' to signal courtship and readiness to spawn. The male acknowledges with no courtship or color displays but rather by visiting the sites frequently. The territorial female then begins pecking at the substrate in preparation for egg laying. The female initiates the spawning event by pressing her abdomen into the prepared site. The territorial male quickly lays his body across her caudal peduncle and both remained in this position for 5-10 sec. The male swims away after leaving the female beating her anal fin rapidly over the nest site to ensure fertilization of the eggs and to push the eggs deep into the algal substrate. All territorial males spawn with territorial females, depriving the bachelor males of the chance to copulate which nevertheless don't interfere with the spawning between the territorial male and females. Haremic; males spawn with a different female each day.

Form shoals (10-100 or more) often with the filefish, Paraluteres prionurus (about 5% of shoal) mimicking Canthigaster valentini to protect it from predators.


Synonym (s)
Canthigaster valentini (Bleeker, 1853)
(Senior synonym)
Tetraodon gronovii Cuvier, 1829
(Junior synonym)
Tetraodon valentini Bleeker, 1853
(Senior synonym)
Tetrodon taeniatus Peters, 1855
(Junior synonym)

Common Name (s)
• Valentinni's Sharpnose Puffer (English)
Economic Importance and Threats
Importance:  Commercial, Dangers
(Aquarium
Poisonous to eat)

Ecology
Habitat:  Reef Associated, Coastal
Trophic Level:  Consumer
Prey:  Filamentous green and red algae, brown and coralline red algae, tunicates, corals, bryozoans, polychaetes, echinoderms and mollusks

Biogeography


• Lakshadweep, Kavaratti Atoll (Lat: 10.55) (Long: 72.63) INDIA (Record: 01/1991-06/1992)

Literature Source(s)
  • Anand, PEV and Pillai, NGK (2003) Habitat distribution and species diversity of coral reef fishes in the reefslope of the Kavaratti atoll, Lakshadweep, India Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin 45(1) 88-98 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at - http://www.fishbase.org

Page last updated on:2010-04-28

Back to Search