# Odontodactylus scyllarus
**Odontodactylus scyllarus** (Linnaeus, 1758), the peacock mantis shrimp, is a brightly colored stomatopod crustacean of the Indo-West Pacific that smashes hard-shelled prey with raptorial appendages accelerated at over \( 10^{5} \ \mathrm{m \ s^{-2}} \), and whose compound eyes support one of the most elaborate visual systems known among animals.[1](https://www.marinespecies.org/aphia.php?id=220297&p=taxdetails) • [2](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a) • [3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/) The species was originally described as *Cancer scyllarus* in Linnaeus's *Systema Naturae* (10th edition, 1758); the combination *Odontodactylus scyllarus* is the accepted name, with *Gonodactylus bleekeri* and *Gonodactylus elegans* treated as junior subjective synonyms.[1](https://www.marinespecies.org/aphia.php?id=220297&p=taxdetails)
| Key fact | Detail |
|---|---|
| Scientific name | *Odontodactylus scyllarus* (Linnaeus, 1758); basionym *Cancer scyllarus*; family Odontodactylidae, order Stomatopoda[1](https://www.marinespecies.org/aphia.php?id=220297&p=taxdetails) • [4](https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=120888) |
| Distribution | Indo-West Pacific, from eastern Africa to Guam, south of Japan to north of Australia, and to Hawaii and New Caledonia[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/) • [5](https://doris.ffessm.fr/Especes/Odontodactylus-scyllarus-Mante-de-mer-paon-1892) |
| Habitat | Depths of 3 to 40 m, most typically 10 to 30 m; water temperatures of 22 to 28 °C; U-shaped burrows near coral reef bases on sandy and gravelly bottoms[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/) |
| Strike mechanics | Strikes lasting a few milliseconds at speeds over 20 m s⁻¹; peak limb impact forces of 400 to 1501 N and peak cavitation forces up to 504 N, thousands of times body weight[2](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a) |
| Vision | 12 types of color photoreceptors, plus receptors for ultraviolet and polarized light; each eye rotates independently in yaw, pitch, and torsion through more than 90 degrees[6](https://www.livescience.com/animals/what-animal-has-the-best-eyesight) • [7](https://pmc.ncbi.nlm.nih.gov/articles/PMC5399772/) |
| Reproduction | Usually monogamous; the female broods the egg mass in the burrow for 9 to 60 days (average 40 days); breeding year-round with peaks in warmer months[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/) |
| Diet | Carnivorous smasher; eats gastropods, bivalves, and crustaceans, with crabs as preferred prey[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/) |
## Taxonomy and classification
The species sits within Stomatopoda, the mantis shrimp order, in the family Odontodactylidae and genus *Odontodactylus* Bigelow, 1893.[1](https://www.marinespecies.org/aphia.php?id=220297&p=taxdetails) • [4](https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=120888) Linnaeus described it in 1758 as *Cancer scyllarus*; a neotype (USNM 274325, from the [Lesser Sunda Islands](https://www.edgepedia.org/lesser-sunda-islands)) fixes the name's application.[1](https://www.marinespecies.org/aphia.php?id=220297&p=taxdetails) Stomatopods divide into "spearers," whose dactyl is a barbed stabbing spear for soft-bodied prey, and "smashers," which can stab with the sharp dactyl tip or strike with its bulbous heel; *O. scyllarus* is a smasher.[2](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a)
## Distribution and habitat
Peacock mantis shrimp occur across the tropical Indian Ocean and the Pacific to Hawaii, from southern Japan to Australia and [New Caledonia](https://www.edgepedia.org/new-caledonia), and between eastern Africa and Guam.[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/) • [5](https://doris.ffessm.fr/Especes/Odontodactylus-scyllarus-Mante-de-mer-paon-1892) They live at depths of 3 to 40 m, most typically 10 to 30 m, in water of 22 to 28 °C, and spend most of their time in U-shaped burrows built near the bases of coral reefs on sandy and gravelly substrate.[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/) By continually excavating new burrows and abandoning old ones, they create shelters used by other animals.[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/)
## The strike
**Power amplification.** All mantis shrimp are thought to use a spring-and-latch mechanism: muscles load a specialized elastic spring while a click mechanism holds the limb in place, and release drives the raptorial appendage forward.[2](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a) In *O. scyllarus* the resulting strike lasts only a few milliseconds, with accelerations over \( 10^{5} \ \mathrm{m \ s^{-2}} \) and speeds over 20 m s⁻¹.[2](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a)
**Two force peaks.** [Sheila Patek](https://www.edgepedia.org/sheila-patek) and Roy Caldwell, both of the Department of Integrative Biology at the [University of California](https://www.edgepedia.org/university-of-california), Berkeley, measured strikes with high-speed video at 100,000 frames per second, force sensors, and hydrophones in animals of 27 to 36 mm carapace length.[2](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a) Each strike produced two brief, high-amplitude force peaks, typically 390 to 480 microseconds apart: the first from the limb's impact, the second from the collapse of cavitation bubbles that form between the dactyl heel and the prey because of the extreme underwater strike speed.[2](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a) Peak limb impact forces ranged from 400 to 1501 N and peak cavitation forces reached 504 N, meaning the shrimp generates impact forces thousands of times its body weight; on average cavitation forces were 50% of the impact force, though they could exceed it by up to 280%.[2](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a) The acoustic signature of the second peak carries more energy above 40 kHz, consistent with bubble collapse.[2](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a) This hammering mechanism differs fundamentally from the cyclic, low-peak-force crushing of fish jaws and lobster claws, and the authors suggest it may have influenced the evolution of shell form.[2](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a) The dactyl club itself has attracted materials-science study for its damage tolerance, including its textured fluorapatite mineral bonded to calcium sulfate.[8](https://www.nature.com/articles/ncomms4187)
## Vision
**Receptor complement.** According to [Justin Marshall](https://www.edgepedia.org/n-justin-marshall), a professor emeritus at the [University of Queensland](https://www.edgepedia.org/university-of-queensland) who studies marine animal eye and brain structure, mantis shrimp have 12 types of color photoreceptors, some tuned to ultraviolet wavelengths, along with photoreceptors that detect the polarization of light.[6](https://www.livescience.com/animals/what-animal-has-the-best-eyesight) In the six-row mid-band of the *O. scyllarus* eye, the top four rows are specialized for color vision and rows five and six for polarization vision.[9](https://pmc.ncbi.nlm.nih.gov/articles/PMC4945877/) Marshall cautions that how the brain processes this input is unclear; the animals may decode patterns of color combinations rather than comparing individual receptor channels, and their compound-eye resolution is low compared with human vision.[6](https://www.livescience.com/animals/what-animal-has-the-best-eyesight)
**Dynamic polarization vision.** Each eye can rotate more than 90 degrees in each of three degrees of freedom: yaw, pitch, and torsion, and the two eyes move largely independently.[7](https://pmc.ncbi.nlm.nih.gov/articles/PMC5399772/) Research published in 2016 showed that *O. scyllarus* rotates its eyes torsionally to align particular photoreceptors with the angle of polarization of a linearly polarized stimulus, maximizing polarization contrast between an object and its background; this was the first documented example of dynamic polarization vision in any animal.[9](https://pmc.ncbi.nlm.nih.gov/articles/PMC4945877/) Behavioral and electrophysiological work has also shown the species can distinguish left- from right-handed circularly polarized light, and from linearly polarized light.[10](https://pubmed.ncbi.nlm.nih.gov/28667244/) The greater than 90-degree torsional range far exceeds the 22.5 degrees needed for dynamic polarization vision, suggesting the rotations serve additional functions.[11](https://pmc.ncbi.nlm.nih.gov/articles/PMC5966611/) The mantis shrimp eye has inspired bioengineered sensors, including organic photodetectors that perform hyperspectral and polarimetric imaging simultaneously.[12](https://pmc.ncbi.nlm.nih.gov/articles/PMC7929508/)
## Feeding, reproduction, and predators
Peacock mantis shrimp are carnivores that eat gastropods, crustaceans, and bivalves; in the wild they take scallops such as *Annachlamys flabellata*, and crabs are their preferred prey. They position a snail on a firm, anvil-like surface before delivering a blow that cracks the shell.[2](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a) • [3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/)
**Reproduction.** Mating, spawning, and hatching all occur in the burrow. The species is usually monogamous, though individuals occasionally mate with different partners. Fertilization is external: the male releases sperm, the female holds it briefly, then releases it with her eggs. She binds the fertilized eggs into a mass with adhesive, carries it on her front thoracic appendages, and broods it in the burrow, cleaning and aerating the eggs with her maxillipeds while not eating.[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/) The gestation period ranges from 9 to 60 days, averaging 40 days, and both sexes reach reproductive maturity at 35 to 70 days.[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/) Breeding occurs year-round with peaks in warmer months, and spawning is nocturnal.[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/)
**Predators.** Few predators are known, but the species has been found in the stomachs of yellowfin tuna (*Thunnus albacares*), and smaller individuals may fall to larger reef fishes. When threatened, the shrimp retreats into its burrow and produces vibrations, called "stomatopod rumbles," to warn off attackers.[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/)
## Relationship with humans
The species is popular in the aquarium trade because of its bright coloration and activity, but it is difficult to keep: it can break aquarium glass, is aggressive toward tankmates, and sometimes enters aquaria accidentally hidden in collected live rock or coral.[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/) Its visual system is a research model for vision science and for digital storage and imaging technologies, since conventional optical data storage uses a single wavelength while the shrimp's eye processes ultraviolet, visible, and polarized light.[3](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/) • [13](https://pmc.ncbi.nlm.nih.gov/articles/PMC3886321/)
## References
1. [Odontodactylus scyllarus (Linnaeus, 1758), WoRMS taxon details](https://www.marinespecies.org/aphia.php?id=220297&p=taxdetails)
2. [Patek, S. N. & Caldwell, R. L. (2005). Extreme impact and cavitation forces of a biological hammer: strike forces of the peacock mantis shrimp Odontodactylus scyllarus. Journal of Experimental Biology 208, 3655-3664.](https://journals.biologists.com/jeb/article/208/19/3655/15838/Extreme-impact-and-cavitation-forces-of-a)
3. [Odontodactylus scyllarus, Animal Diversity Web](https://animaldiversity.org/accounts/Odontodactylus_scyllarus/)
4. [NCBI Taxonomy Browser: Odontodactylus scyllarus](https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=120888)
5. [Odontodactylus scyllarus, DORIS (FFESSM)](https://doris.ffessm.fr/Especes/Odontodactylus-scyllarus-Mante-de-mer-paon-1892)
6. [What animal has the best eyesight? Live Science](https://www.livescience.com/animals/what-animal-has-the-best-eyesight)
7. [The independence of eye movements in a stomatopod crustacean is task dependent, PMC](https://pmc.ncbi.nlm.nih.gov/articles/PMC5399772/)
8. [Textured fluorapatite bonded to calcium sulphate strengthen stomatopod raptorial appendages, Nature Communications](https://www.nature.com/articles/ncomms4187)
9. [Dynamic polarization vision in mantis shrimps, PMC](https://pmc.ncbi.nlm.nih.gov/articles/PMC4945877/)
10. [Circularly polarized light detection in stomatopod crustaceans, PubMed](https://pubmed.ncbi.nlm.nih.gov/28667244/)
11. [Complex gaze stabilization in mantis shrimp, PMC](https://pmc.ncbi.nlm.nih.gov/articles/PMC5966611/)
12. [Mantis shrimp-inspired organic photodetector for simultaneous hyperspectral and polarimetric imaging, PMC](https://pmc.ncbi.nlm.nih.gov/articles/PMC7929508/)
13. [pmc.ncbi.nlm.nih.gov](https://pmc.ncbi.nlm.nih.gov/articles/PMC3886321/)
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*Topic: Encyclopedia › Life and health › Animals › Invertebrates › Arthropods › Crustaceans › Mantis shrimp (stomatopods)*
*Initially written Sep 17, 2026 · Reviewed: Sep 30, 2026; Oct 21, 2026 · Edited: Sep 30, 2026; Oct 21, 2026 · Last review: Oct 21, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license