Emerald Crab (Mithraculus sculptus) | Reef-Safe Bubble Algae Cleanup Crab
$15.99
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Livestock shipping: $59.99 per applicable shipment; no free-shipping threshold. Contiguous 48 states and DC only. Ships Monday–Wednesday by overnight service after preparation. Select fish require up to seven business days before dispatch. DOA claims and photos are due within 12 hours of delivery; replacement shipping is extra.
Shipping & Delivery
Delivery area: Contiguous 48 United States and Washington, DC only. No Alaska, Hawaii, Puerto Rico, other U.S. territories, APO/FPO/DPO, PO boxes, or international delivery. These restrictions also apply through Shopify Collective retailers.
Live animal shipping: $59.99. No free livestock-shipping threshold applies. Livestock travels separately from frozen foods and dry goods; separate shipping groups or fulfillment locations may have separate charges shown at checkout.
Shipping days: Monday–Wednesday via Priority Overnight or an equivalent overnight service, subject to livestock readiness and safe weather/carrier conditions. Overnight transit starts after dispatch, subject to livestock availability and safe shipping conditions.
DOA claims: Contact us immediately and submit clear photographs within 12 hours of carrier-confirmed delivery. Original shipping is nonrefundable; approved replacements require payment of applicable shipping, packaging, and handling. See the Shipping & Live Arrival Policy for documentation, exclusions, and claim review.
Review the Shipping & Live Arrival Policy and final charges at checkout. Livestock delivery is limited to the contiguous 48 states and Washington, DC.
Emerald Crab (Mithraculus sculptus) | Reef-Safe Bubble Algae Cleanup Crab
The Emerald Crab (Mithraculus sculptus) is one of the most effective and popular members of a saltwater aquarium clean-up crew. Famous for helping control nuisance bubble algae (Valonia), these hardworking crabs spend their days grazing on algae, scavenging leftover food, and cleaning live rock and aquarium surfaces.
Their vibrant green coloration and entertaining personality make them a favorite among reef hobbyists. When kept well-fed, Emerald Crabs are generally reef-safe and make an excellent addition to both beginner and advanced reef aquariums.
Features
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Natural bubble algae (Valonia) control
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Grazes on nuisance algae and leftover food
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Reef-safe when properly fed
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Hardy and beginner-friendly
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Excellent addition to any clean-up crew
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Helps maintain a healthier reef ecosystem
Care Information
Scientific Name: Mithraculus sculptus
Temperament: Peaceful
Reef Safe: Yes (when adequately fed)
Difficulty: Easy
Diet: Omnivore (Algae, Seaweed, Pellets, Frozen Foods)
Minimum Tank Size: 10 Gallons
Water Parameters
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Temperature: 72–78°F
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Salinity: 1.023–1.026
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pH: 8.1–8.4
Compatibility
Emerald Crabs are compatible with most peaceful reef fish, corals, shrimp, and snails. They should not be housed with aggressive predators such as large wrasses, triggerfish, puffers, or other animals known to prey on crustaceans. If natural algae becomes limited, supplement their diet with dried seaweed or sinking algae-based foods to keep them healthy and reduce the likelihood of them picking at other tank inhabitants.
Why Shop with Infinity and Beyond Aquatics?
At Infinity and Beyond Aquatics, we know purchasing live animals online requires trust. Every order is carefully handled to ensure your new aquarium inhabitants arrive healthy and ready to thrive.
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Carefully inspected before shipment
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Professionally packed in insulated cooler boxes
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Heat or cold packs added when weather requires
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Overnight shipping to minimize transit stress
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Responsive customer service before and after your purchase
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Passionate hobbyists dedicated to helping you succeed
Whether you're building your first reef or expanding an established display, we're committed to delivering healthy livestock with the care your aquarium deserves.