{"product_id":"arrow-crab-stenorhynchus-seticornis-saltwater","title":"Arrow Crab (Stenorhynchus seticornis)","description":"\u003cdiv style=\"font-family:Georgia,serif;color:#1a1a1a;max-width:860px;line-height:1.7;\"\u003e\n\u003cdiv style=\"background:#FBE9E7;border-left:4px solid #D84315;padding:10px 14px;margin:0 0 14px;font-size:0.95em;\"\u003e\n\u003cstrong\u003eIn-store pickup only.\u003c\/strong\u003e Your order is reserved, we hold off on bagging until you arrive so it stays healthy in its display tank.\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003eArrow Crab\u003c\/strong\u003e (\u003cem\u003eStenorhynchus seticornis\u003c\/em\u003e) brings a striking silhouette to the aquarium, with a pointed body, fine stripes and exceptionally long legs. It searches rockwork for meaty leftovers and small worms, but its appetite makes it an \u003cstrong\u003eintermediate-care, semi-aggressive choice\u003c\/strong\u003e that needs thoughtfully selected tankmates.\u003c\/p\u003e\n\u003cp\u003eExplore our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/freshwater-invertebrates\"\u003einvertebrate collection\u003c\/a\u003e and \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/salt-water\"\u003esaltwater selection\u003c\/a\u003e to compare animals that suit your aquarium.\u003c\/p\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #D84315;padding-left:8px;\"\u003eCare Guide\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGive it room:\u003c\/strong\u003e We recommend an established aquarium of at least 30 gallons, with stable rockwork, crevices and space for its long legs. Keep one Arrow Crab per aquarium.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed deliberately:\u003c\/strong\u003e Offer small portions of mysis, chopped marine seafood or suitable sinking foods. Make sure food reaches the crab; leftovers alone are not a feeding plan. Remove uneaten portions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep conditions steady:\u003c\/strong\u003e Check salinity and temperature regularly. Drip acclimate carefully to match your aquarium, maintaining temperature throughout the process.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvoid copper:\u003c\/strong\u003e Never expose the crab to copper medication. Check treatment labels for invertebrate safety before use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRespect molting:\u003c\/strong\u003e A shed shell can look like a dead crab. Check its hiding places before assuming a loss, and leave a healthy crab undisturbed while its new shell hardens.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #D84315;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;max-width:640px;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eScientific name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cem\u003eStenorhynchus seticornis\u003c\/em\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eCommon names\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003eArrow Crab, Yellowline Arrow Crab, Spider Crab\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003eWestern Atlantic and Caribbean\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eCare level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003eIntermediate: stable water and careful tankmate selection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eTemperament\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003eSemi-aggressive; opportunistic predator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eAdult size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003eAbout 6 inches across the legs; allow room for larger specimens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eRecommended aquarium\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e30 gallons or larger with established rockwork\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eReef compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003eWith caution; ornamental worms, crustaceans and coral polyps may be at risk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eDiet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003eMeaty marine foods, sinking foods and small worms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eTemperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e72 to 78°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eSpecific gravity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e1.023 to 1.025\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003epH \/ alkalinity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e8.1 to 8.4 \/ 8 to 12 dKH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003e\u003cstrong\u003eSale unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #FFCCBC;padding:6px 10px;\"\u003eOne crab; representative image, appearance varies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #D84315;padding-left:8px;\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eChoose tankmates carefully.\u003c\/strong\u003e Small ornamental shrimp, feather dusters, other crabs and small or slow-moving fish can become prey. Coral polyps may also be picked at, particularly when food is scarce. Feeding well reduces hunger but does not guarantee compatibility.\u003c\/p\u003e\n\u003cp\u003eAvoid crab-eating fish such as puffers, triggers, hawkfish and large predatory wrasses. Do not add an Arrow Crab to a tank simply to eliminate bristleworms; it can eat desirable worms too, and still needs feeding once easy prey is gone.\u003c\/p\u003e\n\u003cp\u003eIf algae grazing is your main goal, compare the \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/emerald-crab-mithraculus-sculptus-saltwater-reef\"\u003eEmerald Crab\u003c\/a\u003e as a different option. This is an alternative to consider, not a recommendation to house both crabs together.\u003c\/p\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #D84315;padding-left:8px;\"\u003eRecommended Foods \u0026amp; Supplies\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/ocean-nutrition-prime-reef-flake\"\u003eOcean Nutrition Prime Reef Flake\u003c\/a\u003e: a supplemental prepared food; make sure a portion reaches the crab and vary with meaty foods.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/instant-ocean-aquarium-hydrometer\"\u003eInstant Ocean Aquarium Hydrometer\u003c\/a\u003e: monitor specific gravity and avoid sudden salinity changes.\u003c\/li\u003e\n\u003cli\u003eBrowse \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/nutrition\"\u003efoods and nutrition\u003c\/a\u003e for marine feeding options and \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003ewater testing supplies\u003c\/a\u003e for routine checks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #D84315;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWill it eat bristleworms?\u003c\/strong\u003e\u003cbr\u003eIt may eat small bristleworms, but results vary. Buy it because it fits your tank and you want to care for it, rather than as a guaranteed pest treatment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it safe with corals and shrimp?\u003c\/strong\u003e\u003cbr\u003eUse caution around corals and avoid vulnerable ornamental shrimp. This is a predator and scavenger, not a universally safe cleanup animal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I keep more than one?\u003c\/strong\u003e\u003cbr\u003eWe recommend one per aquarium because Arrow Crabs can become territorial toward their own kind.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes one purchase include one crab?\u003c\/strong\u003e\u003cbr\u003eYes. Each purchase is for one Arrow Crab. The image represents the species; size, markings and sex can vary.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Squeaky's Aquatics","offers":[{"title":"Default Title","offer_id":50595068707035,"sku":"SW4-SW0212","price":17.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/6ac6d25f98f1614bf4c1e8ce_981bdff5-e47f-46db-945e-8aa99221d385_0_hq_FTvIb.png?v=1791415094","url":"https:\/\/squeakysaquatics.com\/products\/arrow-crab-stenorhynchus-seticornis-saltwater","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}