Invertebrates represent more than 95% of known species on Earth. These animals are without backbones and provide numerous benefits to Marine Aquarium. One of the most important benefit of invertebrates is that they are helpful in removal of algae and fish waste. Some of them are algae eaters and others are detritus eaters.
Algae eaters keep aquarium clean by eating nuisance algae like cyanobacteria, brown diatoms, bubble algae, green algae and hair algae. Some of the algae eaters inverts are crabs, hermits, snails, starfish and many more. Detritus are any organic matter that naturally occurs in aquarium like left over fish waste and fish food. They build up in tank, dissolve in water column, cause elevated levels of ammonia and one of the fish killer in aquariums. This can be avoided by having diverse, interesting, colorful and unusual detritus eaters. Few example of them are sea urchins, anemones, sea cucumbers and lots more.
Urchins
Sea Urchins are approximately 2″-3″ in diameter, with spines extending possibly twice the distance. Care must be taken to prevent Urchins from accidentally overturning rocks in reef tank causing damage to themselves and other reef inhabitants such as live corals. Sea Urchins make great additions to marine aquariums, consuming undesirable algae and detritus within tank.
Pincushion Urchin, Blue Tuxedo: Tuxedo Pincushion Urchin or Sphere Urchin or Globe Urchin, has five to ten broad-colored bands usually blue or black, with red, brown or dark spines. This very striking combination, gives it “formal” look and thus name “Tuxedo Urchin.” During day, it will hide among rocks, in crevices, or under plants in a sandy substrate. At night, it will emerge to graze on algae present in or near its home. Tuxedo Pincushion Urchin generally roams alone, but several of them could be housed in same aquarium if it is large enough to provide them with adequate food (algae) and shelter. It is sensitive to high levels of copper-based medications and it will not tolerate high nitrate levels. If it starts to lose a number of spines, it is often due to poor water conditions. If algae levels are particularly low, its diet will need to be supplemented with dried seaweed. Original price of small Blue Tuxedo at LiveAquaria is $24.99 and save 43%.

Tridacna Clams
Tridacna Clams have become very popular among marine aquarists. Most distinguishing feature of clams is their large two-part shell and interior mantle. Most have intricately colored patterns in mantle, making them attractive additions to marine aquarium.
Derasa Clam - Aquacultured: Derasa Clam or Southern Giant Clam or Smooth Giant Clam. Latter name refers to relative lack of ribbing and scales on shell. Smoothness of its thick shell, and 6-7 vertical folds helps to differentiate its species from T. gigas, its larger relative which is not as smooth and has 4-5 folds. In an aquarium, however, scutes may develop on Deresa Clam. Its mantle is a mixture of orange, yellow, blue, and black and white and usually has a wavy striped or spotted pattern, usually with vivid blues and greens. It has a narrow byssal opening and in-current siphon has tentacles. This species is one of largest of “giant” clams, and grows rapidly, reaching a maximum size of approximately 20 inches. Under proper conditions, smaller Derasa Clams can double or triple their size in less than a year. Those in aquarium trade are usually cultured.
Derasa Clam is most widely available and hardy of Tridacna clams. It needs bright lighting supplied by intense fluorescent or metal halide lamps to live, grow, and keep its bright colors. A daylight fluorescent tube is also recommended. Deresa Clam requires calcium levels of 400-480 mg/L and an alkalinity of 7 to 12 degrees. Proper levels of strontium and iodine are also needed.
Deresa Clam relies heavily on photosynthesis of zooxanthellae cells growing in its mantle. However, all clams also require micro foods designed for filter feeders, especially when small. Offer phytoplankton and other micro-foods, such as Marine Snow. Original price of 1 1/2 in. to 2 in. aquacultured Derasa Clam at LiveAquaria is $39.99 but now you can have it for $24.99 and save 38%.

Cucumbers
Sea Cucumbers are best kept in reef or invertebrate aquariums. Water quality must be maintained at highest levels, and care must be taken with any water intakes/overflows to ensure that Sea Cucumber cannot become attached.
Spiny Sea Cucumber, Green w/Pink & Yellow: Pink and Green Sea Cucumber is a colorful filter feeder for home reef aquariums over 30 gallons. Rows of pink knobby thorns run lengthwise along its green and yellow body. Like Sea Apples, striking yellow and pink tentacles extend during feeding. Unlike most other sea cucumbers this animal normally stays stationary, when it finds a suitable location in aquarium with proper flow. This species of Sea Cucumber feed by pulling small particulates from water column, which stick to hair-like appendages off of its plume. Particulates are then moved to mouth and ingested. Feed daily with zooplankton or other liquid invertebrate food.
Like other Sea Cucumbers, Pentacta anceps has potential to poison an aquarium. Chances of this happening are very rare unless animal is accidentally sucked into an uncovered pump intake or overflow boxes. Also avoid stocking with fish that normally pick at sessile invertebrates. Be sure to acclimate properly and house with appropriate inhabitants. Drip-acclimation method is recommended to minimize exposure to fluctuating water parameters. Pink and Green Sea Cucumber cannot tolerate high nitrate levels or copper-based medications. Original price of Spiny Sea Cucumber at LiveAquaria is $15.99 but now you can have it for $11.99 and save 25%.

Anemones
Most Anemones are sessile with a specialized foot used to anchor them in soft substrates or attach themselves to rocks and corals. Provide excellent water conditions, moderate to strong current, and intense lighting. Bits of shrimp or other meaty foods can be used to supplement their diet.
Condy Anemone: Condy Anemone is also known as Haitian Anemone or Giant Golden Anemone. It is found throughout Caribbean and Western Atlantic, in lagoons or on inner reefs, as individuals, or loose groups. It is never found in connected clusters. Its disc diameter is of 16″ (40 cm), but a disc of about 4″ (10 cm) is common in an aquarium. This species has diverse color variations. Base color is usually brown to white and tentacles may or may not have magenta, purple, or green tips on its long tapering tentacles. Tentacles may occasionally develop a bubble-like appearance to them. It prefers to bury its base in sand or into crevice of a rock for protection.
Condy Anemone requires strong light and should never be purchased if a good lighting system is not in place. It will do well in an aquarium with live rock and several crustaceans. Although a Condy requires a reef environment, it is not best suited for reef aquarium. Condy Anemone moves around tank and has a sting that can inflict grave damage to other anemones and corals. Do not include its natural predators such as Red-Leg Hermit Crab. Unlike other anemones, Condy Anemone does not have a relationship with any particular fish, and it is rare for any type of clownfish or damsel to reside within them. Diet should include feedings of fish, mussels, shrimp, or other foods of this type. Original price of Condy Anemone at LiveAquaria is $10.99 but now you can have it for $7.99 and save 27%.

Fan Worms
Fan Worms are marine segmented worms that are sessile, attached to rocks or sand by their base. Plume of Fan Worms can measure up to 10″ in diameter on some species. Fan Worms require excellent water quality. Fan Worms require supplemental feeding with infusoria or foods designed for filter-feeding invertebrates.
Dwarf Colored Feather Duster: Dwarf Colored Feather Duster is exquisite in both form and shape. Its fan-shaped radiole is a gorgeous pink, white, or yellow color that dresses any aquarium. Because it will grow only up to 4″, this species of Bispira is suited for any sized aquarium. Like other members of Sabellidae family, Dwarf Colored Feather Duster uses its radiole to filter out small floating organisms, which it directs toward its mouth, located at center of crown. Dwarf Colored Feather Duster protects its segmented body by secreting a parchment tube to cover itself. When it is disturbed or threatened, it can quickly pull its radiole into tube. If Dwarf Colored Feather Duster is severely stressed, it will discard its crown, growing it back later.
Dwarf Colored Feather Duster is usually found in coral rubble at base of reef, with some of rubble being incorporated into its parchment-like tubes. It requires a well-established reef system since it is dependent upon floating plankton for its diet. Supplemental feeding of phytoplankton and liquid organic foods should be provided. Like other invertebrates, Dwarf Colored Feather Duster is very intolerant of copper-based medications and fluctuations in water parameters. Original price of Dwarf Colored Feather Duster at LiveAquaria is $9.99.

While setting a marine aquarium, go for live rock because some Invertebrates take their food from parasites that are found on live rock. There are innumerable ways in which aquarium can be fill, so that fishes are comfortable in their surroundings and it is a pleasure to look at. Keep Ritteri Anemone, Spiny Sea Cucumber, Blue Tuxedo, which beautify marine aquarium by their colorful, unusual nature.