{"product_id":"emerald-crabs","title":"Emerald Crabs","description":"\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"fbskMG_root markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\"\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eThe \u003cstrong\u003eEmerald Crab\u003c\/strong\u003e is one of the most popular algae-eating invertebrates used in saltwater reef aquariums. Recognizable by its green coloration and compact body, this active clean-up crew member spends much of its time picking through live rock in search of algae, leftover food, and organic debris.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eEmerald Crabs are especially popular with reef keepers because of their reputation for eating \u003cstrong\u003ebubble algae (Valonia)\u003c\/strong\u003e. While individual feeding behavior can vary, they can be a valuable part of a diverse \u003cstrong\u003esaltwater aquarium clean-up crew\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eEmerald Crab Care\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eScientific Name:\u003c\/strong\u003e \u003cem\u003eMithraculus sculptus\u003c\/em\u003e\u003cbr\u003e\u003cstrong\u003eCommon Name:\u003c\/strong\u003e Emerald Crab \/ Emerald Mithrax Crab\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Marine Crab \/ Clean-Up Crew\u003cbr\u003e\u003cstrong\u003eCare Level:\u003c\/strong\u003e Easy\u003cbr\u003e\u003cstrong\u003eTemperament:\u003c\/strong\u003e Generally Peaceful\u003cbr\u003e\u003cstrong\u003eReef Safe:\u003c\/strong\u003e Generally Reef Safe\u003cbr\u003e\u003cstrong\u003eDiet:\u003c\/strong\u003e Omnivore \/ Algae Grazer \/ Scavenger\u003cbr\u003e\u003cstrong\u003eAdult Size:\u003c\/strong\u003e Approximately 2–2.5\"\u003cbr\u003e\u003cstrong\u003eAquarium Area:\u003c\/strong\u003e Rockwork \u0026amp; Crevices\u003cbr\u003e\u003cstrong\u003eWater Temperature:\u003c\/strong\u003e 74–80°F\u003cbr\u003e\u003cstrong\u003eSalinity:\u003c\/strong\u003e 1.023–1.026 SG\u003cbr\u003e\u003cstrong\u003eRecommended pH:\u003c\/strong\u003e 8.1–8.4\u003c\/p\u003e\n\u003ch2\u003eDo Emerald Crabs Eat Bubble Algae?\u003c\/h2\u003e\n\u003cp\u003eEmerald Crabs are commonly added to reef aquariums as a \u003cstrong\u003enatural way to help control bubble algae\u003c\/strong\u003e. They may pick individual bubbles from rockwork while grazing and can reach areas that are difficult to clean manually.\u003c\/p\u003e\n\u003cp\u003eHowever, not every Emerald Crab will eat bubble algae, and they should not be considered a guaranteed solution to an outbreak. Managing nutrients, removing accessible bubble algae, and maintaining a diverse clean-up crew are still important for long-term control.\u003c\/p\u003e\n\u003ch2\u003eWhat Do Emerald Crabs Eat?\u003c\/h2\u003e\n\u003cp\u003eEmerald Crabs are opportunistic omnivores. In addition to nuisance algae, they may consume \u003cstrong\u003efilm algae, leftover fish food, detritus, and other organic material\u003c\/strong\u003e found throughout the aquarium.\u003c\/p\u003e\n\u003cp\u003eIf natural algae becomes limited, supplemental feeding is recommended. Dried marine algae, algae-based sinking foods, pellets, and occasional meaty marine foods can help keep the crab well fed.\u003c\/p\u003e\n\u003ch2\u003eAre Emerald Crabs Reef Safe?\u003c\/h2\u003e\n\u003cp\u003eEmerald Crabs are \u003cstrong\u003egenerally considered reef safe\u003c\/strong\u003e, particularly when appropriately fed. Most spend their time grazing rockwork rather than bothering healthy corals.\u003c\/p\u003e\n\u003cp\u003eAs with many opportunistic crabs, individual behavior can vary. A hungry or larger Emerald Crab may become more likely to investigate other food sources, so adequate feeding is important in very clean reef systems.\u003c\/p\u003e\n\u003cp\u003eLike other marine invertebrates, Emerald Crabs are sensitive to rapid changes in salinity and water chemistry. Careful acclimation and stable reef parameters are recommended.\u003c\/p\u003e\n\u003ch2\u003eWhy Add an Emerald Crab to Your Clean-Up Crew?\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eEmerald Crab\u003c\/strong\u003e provides a different style of algae control than snails and hermit crabs. Its ability to pick through cracks and crevices in live rock makes it a useful addition to a balanced clean-up crew.\u003c\/p\u003e\n\u003cp\u003eFor reef keepers dealing with nuisance algae—particularly \u003cstrong\u003ebubble algae\u003c\/strong\u003e—Emerald Crabs are one of the most commonly selected clean-up crew invertebrates.\u003c\/p\u003e\n\u003cp\u003eEmerald Crabs are also included in our \u003cstrong\u003eIsland Reef Aquatics Large Invert Pack\u003c\/strong\u003e, alongside other algae grazers, scavengers, and sand-bed cleaners.\u003c\/p\u003e\n\u003cp\u003eAvailable from \u003cstrong\u003eIsland Reef Aquatics\u003c\/strong\u003e with local pickup in Deltona, Florida and shipping available.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Island Reef Aquatics","offers":[{"title":"Default Title","offer_id":48662493855938,"sku":null,"price":6.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/3354\/5666\/files\/Emerald_Crab_Mithraculus_sculptus_reef_clean_up_crew_and_bubble_algae_eater_for_saltwater_aquarium.png?v=1789424466","url":"https:\/\/islandreefaquatics.com\/products\/emerald-crabs","provider":"Island Reef Aquatics","version":"1.0","type":"link"}