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Diodon holocanthus

(Ajargo)

Overview

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Inhabits shallow reefs to open, soft bottoms . Also in areas with rocky substrata . Sometimes forms groups[1]. Juveniles pelagic to about 6-9 cm. Solitary. Feeds on mollusks, sea urchins, hermit crabs, and crabs at night[2]. A relatively poor swimmer [1]. Used in Chinese medicine[3]. Captured at the surface using a hand net [4].

Interesting Facts

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Common Names

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Click on the language to view common names.

Common Names in Afrikaans:

Ballon-Penvis

Common Names in Bikol:

Mosi

Common Names in Carolinian:

Taius-Wushuga

Common Names in Cebuano:

Buriring, Butete, Tagotong

Common Names in Chavacano:

Lukoh Itingan, Tagutugan

Common Names in Creole, French:

Boule Tangue

Common Names in Creole, Portuguese:

Peixe-Crum, Porkspim

Common Names in Danish:

Almindelig Pindsvinefisk

Common Names in Davawenyo:

Tagutongan

Common Names in English:

Ajargo, Balloon Porcupinefish, Balloonfish, Baloon Porcupinefish, Baloon Pufferfish, Baloonfish, Bloched Porcupine Fish, Blotched Moray, Blotched Porcupine, Blotched Porcupinefish, Brown Porcupine Fish, Brown Porcupinefish, Fine-Spotted Porcupinefish, Freckled Porcupinefish, Hairy Porcupinefish, Hedgehog Fish, Long-Spine Porcupinefish, Long-Spined Porcupine Fish, Longspine Porcupinefish, Porcupine, Porcupinefish, Spiny Balloonfish, Spiny Porcupinefish, Spiny Puffer, Spiny Pufferfish

Common Names in Fijian:

Sokisoki

Common Names in French:

Petit Porc-, Porc-, Souffleur

Common Names in German:

Bunte Limia, Igelfisch

Common Names in Hawaiian:

O´opu, O'opu, Okala

Common Names in Hiligaynon:

Botiti, Tagutongan

Common Names in Ilokano:

Busisi

Common Names in Japanese:

Hari-Senbon, Harisenbon

Common Names in Konkani:

Bankocho

Common Names in Korean:

Ka-Shi-Pok, 가시복

Common Names in Malay:

Buntal Landak, Buntel Duren

Common Names in Mandarin Chinese:

Li, 九斑刺魨, 九斑刺鲀, 六斑二齒魨, 六斑二齿鲀, 六斑刺魨, 六斑刺鲀, 刺規, 刺规, 气瓜仔, 氣瓜仔

Common Names in Maranao/Samal/Tao Su:

Daut-Dotan

Common Names in Polish:

Najezka

Common Names in Portuguese:

Baiacu, Baiacu De Espinho, Baiacu-De-Espinho, Crum, Peixe-Ouri

Common Names in Somali:

Qaruumbo-Maanyo

Common Names in Spanish:

Guan, Pejerizo, Pejerizo Bal, Pez Eriso, Pez Erizo, Pez Erizo Bal, Pez Erizo Mapache, Puercoesp, Tamboril Negro, Tamborillo

Common Names in Swahili:

Bunju, Bunju Nungu, Puju

Common Names in Swedish:

Brunfl

Common Names in Tagalog:

Boteteng Laot, Botiting Laot, Buktit, Buteteng Laot, Ganutan

Common Names in Tahitian:

Areva, Aufa, Totara

Common Names in Waray-waray:

Otit

Description

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Physical Description

Species Diodon holocanthus

Distinctive Features: The body is covered in long, sharp spines that stick out when the fish inflates. The balloonfish inflates by taking water into its body when it is threatened. All members of the family Diodontidae are capable of inflation. Along with inflation, there may also be a color change due to the excitement.

Color:

The balloonfish is distinguished from similar species by the large, dark blotches on the sides and back that dominate its color pattern and the small black spots interspersed between them. Unlike its relative, the porcupinefish (Diodon hystrix), these small spots do not extend onto the fins . See Diodon key for further information. The balloonfish has a brown bar above and below each eye. The anal , dorsal, and pectoral fins are mainly used for navigating through corals at a slow speed .

Size/Age/Growth

This species commonly grows to lengths of 8-14 inches (20-35 cm), reaching a maximum of 20 inches (50 cm).

Habitat

Adult balloonfishes occur on shallow reefs amongst mangroves and in open bottom areas including seagrass beds and rocky substrates. Swimming closely to the bottom, they are found at depths ranging from 6-35 feet (2-100m) below the surface of the water. May be found at depths of 2 to 100 meters. Usually found at depths of 2 to 35 meters.

Typically found in water with a depth of 0 to -5,500 meters (0 to -18,045 feet).[5]

Biome: Marine .

Biology

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Diet

Balloonfish are nocturnal predators , generally hiding in crevices during the day. The teeth are fused together into a single unit , creating a strong , beak-like mouth capable of cracking the shells of snails, sea urchins, and hermit crabs.

Reproduction

The balloonfish has a pelagic, or open-ocean, life stage. Spawning occurs after males slowly push females to the water surface. The eggs are spherical and buoyant , floating in the water. Hatching occurs roughly after four days. The larvae are predominately yellow with scattered red spots. They are well developed with a functional mouth , eyes, and a swim bladder. Larvae less than ten days old are covered with a thin shell . After the first ten days, the shell is lost and the spines begin to develop. The larvae undergo a metamorphosis approximately three weeks after hatching. During this time, all the fins and fin rays are present and the teeth are formed. The red and yellow colors of the larvae do not persist into the juvenile phase and are replaced by the olives and browns, characteristic of adults . Dark spots also appear on the juvenile's underside. Pelagic juveniles are often associated with floating sargassum, and these spots may serve as camouflage from predators such as dolphin that swim below the seaweeds. Juveniles retain spotting until they move inshore and become adults. The juvenile balloonfish does not undergo another metamorphosis to become an adult. All changes now are external and include elongation of the spines and normal body growth.

Behavior

Predators:

Juvenile balloonfish are consumed by many pelagic predatory fishes , most notably tunas and dolphins . Adults fall prey to sharks .

Taxonomy

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Synonyms

Atopomycterus bocagei Steindachner • Diodon holacanthus Linnaeus • Diodon hystrix holocanthus Linnaeus • Diodon hystrix Linnaeus • Diodon liturosus Shaw • Diodon maculifer Kaup • Diodon multimaculatus Cuvier • Diodon novemaculatus Cuvier • Diodon novemmaculatus Cuvier • Diodon paraholocanthus Kotthaus • Diodon pilosus Mitchill • Diodon quadrimaculatus Cuvier • Diodon sexmaculatus Cuvier • Paradiodon quadrimaculatus (Cuvier • Trichodiodon pilosus (Mitchill

Notes

Name Status: Accepted Name .

Last scrutiny: Data last modified by FishBase 08-Aug-1995

Similar Species

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Members of the genus Diodon

ZipcodeZoo has pages for 18 species and subspecies in this genus:

D. antennatus (Bridled Burrfish) · D. atringa (Spotted Burrfish) · D. calori (Four-Bar Porcupinefish) · D. echinatus (Whispy Burrfish) · D. eydouxii (Pelagic Porcupinefish) · D. fuliginosus (Black Burrfish) · D. histrix (Black-Spotted Porcupinefish) · D. holacanthus (Black-Spotted Porcupinefish) · D. holocanthus (Ajargo) · D. hystrix (Ajargo) · D. jaculiferus (Long-Spined Porcupinefish) · D. liturosus (Black Blotched Porcupinefish) · D. nicthemerus (Slender-Spined Porcupine Fish) · D. nycthemerus (Slender-Spined Porcupine Fish) · D. orbicularis (Orbicular Burrfish) · D. reticulatus (Few-Spined Porcupinefish) · D. rivulatus (Striped Burrfish) · D. totara (Longfin Lanternfish)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 15, 2007:

Identifiers

Footnotes

  1. Lieske, E. and R. Myers (1994). Collins Pocket Guide. Coral reef fishes. Indo-Pacific & Caribbean including the Red Sea. Haper Collins Publishers, 400 p. [back]
  2. Leis, J.M. (2001). Diodontidae. Porcupine fishes (burrfishes). p. 3958-3965. In K.E. Carpenter and V. Niem (eds.) FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Vol. 6. Bony fishes pa ... [back]
  3. Tang, W.-C. (1987). Chinese medicinal materials from the sea. Abstracts of Chinese Medicine 1(4):571-600. [back]
  4. Norman, J.R. (1939). Fishes. p. 1-116. In John Murray Expedition Scientific Reports. Vol. 7. British Museum of Natural History, London. [back]
  5. Mean = -572.620 meters (-1,878.675 feet), Standard Deviation = 1,260.450 based on 453 observations. Ocean depth information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 7/15/2012