The peacock mantis shrimp is the famous, gaudily colored 'smasher' stomatopod — an intelligent reef predator armed with spring-loaded clubs that strike at over 50 mph (80 km/h) with enough force to crush snails, crabs and clams, and even crack aquarium glass. It also has perhaps the most complex eyes of any animal, with around a dozen photoreceptor types. Kept by enthusiasts as a fascinating, interactive pet in a dedicated, well-built species tank.
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Educational only. KinStation content is reviewed by licensed veterinarians but cannot replace an in-person exam. Always consult a licensed veterinarian or board-certified specialist for diagnosis, treatment, or any decision affecting your pet's health.
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Body about 3-18 cm (1.2-7 in), commonly 10-15 cm; stout, vividly colored, with club-shaped raptorial appendages.
Lifespan
3–6 years
Social needs
solo
Native region
Indo-Pacific (East Africa and KwaZulu-Natal to the Mariana Islands)
Origin
Old World
Climate
🌴 Tropical
Water type
🌊 Marine
Family
Odontodactylidae
Genus
Odontodactylus
Part of the Mantis Shrimp
Stomatopods — not true shrimp — are powerful, intelligent marine crustaceans armed with raptorial appendages that either club (smashers) or spear (spearers) their prey, plus some of the most advanced eyes in the animal kingdom. Often arriving as hitchhikers and feared as tank pests that can crack glass and crush snails, they are also kept on purpose as fascinating specimens in dedicated species ta
How this animal changes through its life — each stage often has its own care, diet and space needs.
Photo coming soon
Larva
Most marine invertebrates hatch into microscopic planktonic larvae (such as the zoea of crustaceans or the bipinnaria/veliger of echinoderms and mollusks) that drift and feed in the water column. The larva looks nothing like the adult and undergoes major reorganization.
Photo coming soon
Juvenile
After settling out of the plankton, the juvenile takes on a recognizable miniature of the adult body plan — a tiny shell, a small star, or a translucent shrimp. Crustaceans grow by molting, shedding the exoskeleton to enlarge.
Photo coming soon
Adult
Adults reach full size and reproductive maturity with the species' mature shell, shape, or coloration. Many continue to molt or grow throughout life, and some show sex differences in size or claw/appendage shape.
Color & pattern variants
Natural variants occur in the wild; selectively bred (man-made) variants were developed in captivity.
Natural
Natural form
The wild-type animal, brilliantly colored in green, orange, red and blue with spotted, club-shaped raptorial appendages and stalked, mobile eyes. There are no aquarium-bred color strains; all are wild-caught and the vivid coloration is natural.
Habitat & enclosure
Keep a single mantis in its OWN dedicated species tank of at least 20-30 gallons (75-115 L), built specifically to contain it: a deep sand bed for burrowing, rock it can excavate beneath, and — critically — thick-walled (ideally low-iron starphire or extra-thick acrylic, or at minimum sturdy) glass, since the club strike can chip or crack thin panes. Maintain stable tropical reef parameters: temperature 72-80F (22-27C), pH 8.1-8.4, salinity SG 1.024-1.026, alkalinity 8-11 dKH and low nitrate with no ammonia or nitrite.
It is an Indo-Pacific reef animal, ranging from East Africa and South Africa's KwaZulu-Natal to the Mariana Islands, where it digs U-shaped burrows in loose substrate near the base of reefs at 3-40 m. Moderate flow and any reef lighting are fine; it does best when it can build and defend a burrow.
Substrate
A deep sand or mixed sand-and-rubble bed it can excavate is essential, with rock it can wedge into or tunnel beneath to form a defended burrow; set rock on the tank bottom rather than on shifting sand so it can't be undermined. The burrow is central to its security and behavior.
Equipment & setup
Run standard reef filtration (live rock, protein skimmer, heater, moderate-flow powerhead) on a strictly copper-free system, and maintain trace iodine for clean molts. The non-negotiable 'equipment' is containment: a thick-walled, sturdy tank the strike can't crack and a tight, secured lid, since mantis shrimp can and do escape. A dedicated species tank with no prized tankmates is the standard setup.
Diet
An active carnivore that smashes hard-shelled prey. Feed a varied meaty diet of shell-on items — snails, hermit crabs, crab legs, whole shrimp, clams, mussels and chunks of marine fish — a few times a week, which both nourishes it and lets it use its clubs naturally. Hard-shelled prey is important; a diet of only soft food can leave it underexercised. It will readily take food from feeding tongs once settled.
Behavior & temperament
Highly intelligent, alert and interactive — it tracks movement outside the glass and quickly learns its keeper and feeding routine — but it is a formidable predator and absolutely NOT reef- or community-safe: it will smash and eat snails, crabs, hermits, clams, ornamental shrimp and small fish, which is why it is kept alone in a dedicated tank (and why it is dreaded as a live-rock hitchhiker). It is solitary and territorial, defending its burrow. Its strike is fast enough to dismember prey instantly, hence the nickname 'thumb splitter.'
Health
Hardy in a stable, copper-free tank, but as a crustacean it is sensitive to copper, salinity and temperature swings, and low iodine/trace elements that cause failed molts; never use copper medications and maintain trace iodine. KEEPER SAFETY: the raptorial clubs strike with extreme speed and force and can cut or break human skin and split a fingertip — never put bare hands in the tank with it, move it only in a sturdy container (never by hand or net), and use a tight, secure lid. It can also crack thin glass, so house it accordingly. Watch for it during maintenance, as it may strike at tools or fingers near its burrow. (Educational and safety information only — not medical or veterinary advice.)
Tips, DIY & hacks
House it alone in a purpose-built tank and never with snails, crabs, shrimp or small fish you want to keep. Treat it like venomous-grade livestock for handling: no bare hands, always a rigid container, and a secure lid. Drip-acclimate slowly. If one arrives unwanted as a live-rock hitchhiker, trap it (a baited bottle trap works) and either rehouse it or rehome it rather than tearing the rock apart. Feed shell-on prey to keep it active and its clubs in use.
Reviewed and signed off by: KinStation Editorial — pre-launch draft (pending DVM review) on 2026-06-09