Category: Sea Urchins Size: 1 to 3 in. (2 to 8 cm)   Depth: 0-130 ft. (0-40 m) Distribution: Caribbean, Bahamas, South Florida

The short and thick spines of Pencil Urchin Assorted Color Urchin radiate out from all around its body and are covered with basal plates. The spines develop algal growth, especially Coralline Algae, as the Eucidaris species ages. Nitrates and Copper in...

Coloration can vary - these are not always white, brown is common as well. Porcelain crabs live in abundance in Pacific Coast tide pools. They hide under stones, between mussels in mussel beds, among sponges and tucked into tufts of algae. Safely...

FREE ON ORDERS OF $250 or MORE - JUST ADD TO CART! Hailed by critics as “the world’s best reefkeeping magazine,” CORAL is written by leading aquarium experts and marine biologists, lavishly illustrated with breathtaking images, and...

This box is ideal for mangrove starts and freshwater plants to be able to establish their root system before planting in substrate. The slats allow for adequate flow around the mangrove roots and stalk. Held on with extremely strong N52 neodymium magnets...

This box is ideal for mangrove starts and freshwater plants to be able to establish their root system before planting in substrate. The slats allow for adequate flow around the mangrove roots and stalk. Held on with extremely strong N52 neodymium magnets...

BOX DAMAHED - HEATER FINE We have been on the hunt for a reliable heating element that solves a lot of the issues we currently have with other heaters in the hobby. We have always had issues with heaters that have built-in controllers and segregating...

Choose your own rack with the Modular Frag System! The PNW Modular Frag System allows the perfect placement and adjustablity for your prized frags! The base magnet and screw fit into multiple different top pieces from 1-3 frag holes to allow you to...

At only 8 inches by 6 inches, this aquarium has the ideal footprint for any small space without compromising on room for corals and inverts. The cube shape is perfect for a wide variety of creative microscapes, and the all-in-one style filtration has a...

If you have a RMS Tank Mount System, the RMS XR30 Adapter provides the necessary hardware to easily update your RMS Tank Mount for use with your new Radion XR30 LED light. Installation of the hardware only takes a few minutes and you'll be up and running...

Compatible with both G5 and G6 Radion XR30s. Multi-Light Radion Mounting System - Slide Mount The Multi-Light RMS is a modular and customizable Radion LED mounting solution for all XR15 and XR30 systems, Gen 5 and earlier. The RMS Slide Mounts connect...

Optimize Your Radion: The Right Lens Kit for Every Aquarium Ideal for Deep Aquariums or High Radion Mounting Higher PAR, Narrower Focus Compatible with G5 and G6 Radions The EcoTech Radion High Intensity Kit is a valuable accessory designed to...

Optimize Your Radion: The Right Lens Kit for Every Aquarium Ideal for Deep Aquariums or High Radion Mounting Higher PAR, Narrower Focus Compatible with G5 and G6 Radions The EcoTech Radion High Intensity Kit is a valuable accessory designed to...

 An incredibly minimal design packed with an array of full-spectrum RGB+W smart LED’s, SereneSun lets you focus attention on the life you lighting. Whether you are a traditional freshwater aquarist or planted tank hobbyist, SereneSun has you...

Custom color from your couch. Now you can shift the color of your aquatic environment without shifting your body with the industry’s first freshwater-optimized, full spectrum RGB+White aquarium light with wireless remote control. Super bright 6500K...

Custom color from your couch. Now you can shift the color of your aquatic environment without shifting your body with the industry’s first freshwater-optimized, full spectrum RGB+White aquarium light with wireless remote control. Super bright 6500K...

Custom color from your couch. Now you can shift the color of your aquatic environment without shifting your body with the industry’s first freshwater-optimized, full spectrum RGB+White aquarium light with wireless remote control. Super bright 6500K...

Custom color from your couch. Now you can shift the color of your aquatic environment without shifting your body with the industry’s first freshwater-optimized, full spectrum RGB+White aquarium light with wireless remote control. Super bright 6500K...

LEAKED WATER - SAND FINEYou can now bring the world’s most exotic reefs into your home with CaribSea’s Arag-Alive!™ substrates. Eight environmentally accurate ecoscapes, developed through CaribSea’s cooperation with public...

River Brown molded Manzanita driftwood branches add style, color, and depth to virtually any aquarium. Molded from actual curated pieces of Manzanita wood, its flexible, dense forking branches add a lifelike piece of nature to any aquarium. Combine...

The perfect light for any Nano aquarium up to 25 gallons!  Designed for Saltwater aquariums but it will also work great with freshwater tanks.  Producing eye-popping color and amazing color rendition, dynamic color control with...

Special Reef Sand is a a coarse mix of 1-3 mm size aragonite sand sustainably harvested from pristine sites in the Western Pacific and Caribbean. Sterilized then packaged with live BioPronto, naturally occurring beneficial microorganisms that help to...

UNUSED CUSTOMER RETURN Introducing the new Orbit Marine LED, packed with even more ultra-bright LEDs in a far wider color spectrum, now with LOOP App Bluetooth control. Producing eye-popping color rendition and brilliant shimmer effects, the Orbit...

Straightforward and safe water level controller for fresh and sea water with optical control sensor and independent thermal safety sensor. A constant water level keeps the salt concentration constant in seawater aquariums. Incl. Turbelle® High...

UNUSED - TESTED - WORKS Innovative heater range equipped with PATENTED "contactless" temperature electronic control.  The easiest and most immediate way to set the temperature of the heater, just hold the...

This 1 foot long HYDROS System Command Bus Cable allows HYDROS devices to communicate and even provide power to the Control 2 and Control 4.

PNW Custom Ornament Pop stand. You can hang it on your tree and show off your aquarium decor around your house, or use it in the tank for a festive accent! With holiday spirit cut outs including mistletoe and fall trees on the legs, as well as topped...

This Hybrid Filter Sock allows water to flow freely while still pulling out up to 200 micron small particles.  Does a great job cleaning but won't get clogged as easily as regular socks. Long Sock - 4" Diameter x 10" Length

UNUSED CUSTOMER RETURN The solenoid valve is an accessory for the MC122 and the MC125 to automate your dosing of CO2 and makes sure that the plants of your aquarium are always healthy. MA955, solenoid valve, is supplied with 1.5 m cable.

OPEN - NO FACTORY BOX   Moss Green molded Manzanita driftwood branches add style, color, and depth to virtually any aquarium. Molded from actual curated pieces of Manzanita wood, its flexible, dense forking branches add a lifelike piece of nature...

Operated exclusively via the FluvalSmart App on your mobile device, Aquasky allows you to control the light output of red, green blue and super bright 6500K white LEDs for infinite color blends. Programmable, gradual 24-hour light cycle settings...

OEM 100W power supply for the COR-20 Return Pump

Free on Orders of $500 or More! L/XL (7 1/8” - 7 5/8”) Pacific Headwear Legacy Reclaim Baseball CapThe tried-and-true Trucker Snapback from Pacific Headwear is the definition of trucker mesh royalty. Featuring a pro-stitched finish and...

Free on Orders of $500 or More! L/XL (7 1/8” - 7 5/8”) Pacific Headwear 104C Trucker Mesh Baseball CapThe tried-and-true Trucker Snapback from Pacific Headwear is the definition of trucker mesh royalty. Featuring a pro-stitched finish and...

THIS ORNAMENT IS FREE WITH ANY ORDER OVER $100.  JUST ADD $100 WORTH OF PRODUCTS TO YOUR CART AND ADD ONE OF THESE AND IT WILL BE FREE. 'Tis the season to advertise your message on Holiday Ornaments. These Shatterproof Ornaments are proudly made in...

The Red Mandarin is a rare variation of the Blue Mandarin that differs by having a brilliant red body and almost entirely red pelvic and pectoral fins. It is a member of the family Callionymidae that grows to a maximum length of 4”. They originate...

FREE ON ORDERS OF $100 OR MORE! Provide FREE cutting-edge reef-keeping information to hobbyists to encourage responsible reef-keeping and sustainability of our hobby.  Reef Hobbyist Magazine is a reef-focused magazine that teaches hobbyists of all...

PE Flakes are a highly palatable, nutritionally complete fish food designed to enhance coloration and induce an energetic feeding response in all varieties of fish. Both saltwater and freshwater PE Flakes contain fresh PE Mysis as the leading ingredient...

UNUSED CUSTOMER RETURN 95 Watts = HIGH PAR - 250+ PAR at 24" Bring your reef to a whole new level with the R24 PRO LED. Delivering a light intensity and color spectrum specifically for corals, it provides optimal growth, eye-popping color...

TRADESHOW DISPLAY The ReefMat is a plug & play, fully automated, smart fleece roller filter that keeps your aquarium water crystal clear for weeks at a time. Installation Instructions for EVERY Red Sea Model - https://www.redseafish...