This is a list of various species of marine invertebrates, animals without a backbone, that are commonly found in aquariums kept by hobby aquarists. Some species are intentionally collected for their desirable aesthetic characteristics. Others are kept to serve a functional role such as consuming algae in the aquarium. Some species are present only incidentally or are pest species.
![]() | This list is incomplete; you can help by adding missing items. (February 2011) |
Common name(s) | Image | Taxonomy | Reef safe | Care Level | Description | Max size |
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Christmas tree worm[1] | ![]() | Spirobranchus giganteus | Yes | Expert | Found living anchored in live coral colonies in nature. Each worm has two crowns, which come in a variety of different colors, and are spiraled in the shape of a Christmas tree. | 5 cm (2.0 in) |
Cluster duster[1] | ![]() | Bispira brunnea | Yes | Moderate | This species grows in groups of up to 100 individual tube worms, living together in a single clump. The clusters of tubes adhere to a rocky substrate at a central point.[2] | 2.5 cm (1.0 in) |
Feather duster worm, Fan worm[1] | ![]() | Sabellastarte sp. | Yes | Easy to Moderate | A sedentary (but it can scoot around), tube dwelling worm with a fan-shaped crown (radiole) that projects from the end of the tube. This can be white, tan, orange, sometimes with striping. They build their tubes out of sand, mud, and bits of shell. | 20 cm (7.9 in) |
Common name | Image | Taxonomy | Reef safe | Care Level | Description | Max size |
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Atlantic horseshoe crab | ![]() | Limulus polyphemus | Yes, with caution | Easy | A bottom dwelling animal that is actually not a true crab. Found burrowing in mud or sand flats in the wild, they need a deep sand bed in their aquarium. | 60 cm (23.6 in) |
Sea spider[3] | ![]() | Pycnogonids | No | Not collected for the aquarium trade, but occasionally seen on live rock and corals as a hitchiker. They can be pests in a reef tank, preying on soft coral, sponges and anemones. | 0.2–50 cm (0.1–19.7 in) |
Common name(s) | Image | Taxonomy | Temperament | Care Level | Description | Max size |
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Jewel anemone | ![]() | Corynactis viridis | ||||
Knobbly mushroom coral, Florida false coral[4] | ![]() | Ricordea florida | ||||
Knobbly mushroom coral, Yuma mushroom coral[4] | ![]() | Ricordea yuma | Semi-aggressive | Moderate | ||
Mushroom coral, Mushroom anemone, Disk anemone[4] | ![]() | Discosoma sp. | Semi-aggressive | Easy | ||
Strawberry anemone | ![]() | Corynactis californica |
Common name | Image | Taxonomy | Temperament | Care Level | Description | Max size |
---|---|---|---|---|---|---|
Lace coral[5] | ![]() | Distichopora sp. | ||||
Fire coral[5] | ![]() | Millepora sp. |
Common name(s) | Image | Taxonomy | Temperament | Care Level | Description | Max size |
---|---|---|---|---|---|---|
Black sun coral[6] | ![]() | Tubastraea micrantha | Expert | |||
Bubble coral | ![]() | Plerogyra sinuosa | Aggressive | Easy | ||
Candy cane coral | ![]() | Caulastrea furcata | Peaceful | Easy | ||
Elegance coral[7] | ![]() | Catalaphyllia jardinei | Aggressive | Moderate | ||
Flowerpot coral | ![]() | Goniopora sp. | Aggressive | Difficult | ||
Frogspawn coral[8] | ![]() | Euphyllia divisa | Aggressive | Moderate | ||
Hammer coral, Anchor coral[8] | ![]() | Euphyllia ancora | Aggressive | |||
Lobed brain coral | ![]() | Lobophyllia hemprichii | Semi-Aggressive | |||
Open brain coral | ![]() | Trachyphyllia geoffroyi | Semi-aggressive | |||
Pineapple brain coral, Moon coral | ![]() | Favia sp. | Aggressive | |||
Sun coral, Orange cup coral[9] | ![]() | Tubastraea sp., often Tubastrea aurea | Peaceful | Expert | ||
Torch coral | Euphyllia glabrescens | Aggressive | ||||
Whisker coral, Duncan coral[10] | ![]() | Duncanopsammia axifuga | Peaceful | Easy |
Common name | Image | Taxonomy | Temperament | Care level | Description | Max size |
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Pink bird's nest coral[11] | ![]() | Seriatopora hystrix | ||||
Cauliflower coral | ![]() | Pocillopora sp., usually Pocillopora damicornis | ||||
Dimpled encrusting Montipora | ![]() | Montipora verrucosa | ||||
Finger coral[12] | ![]() | Montipora digitata and Montipora samarensis | ||||
Millepora coral, "Milli" coral | ![]() | Acropora millepora | Peaceful | Moderate | A popular and readily available species that comes in many color forms. It should not be confused with fire corals of the genus Millepora. | |
Plating montipora | ![]() | Montipora capricornis | Peaceful | Moderate | ||
Staghorn coral[13] | ![]() | Acropora cervicornis | Peaceful | Difficult | A very rare species, it is generally not available to the average hobby aquarist due to its critically endangered status. It would make a good aquarium specimen, but can only be obtained with a special license. |
Common name(s) | Image | Taxonomy | Temperament | Care Level | Description | Max size |
---|---|---|---|---|---|---|
Cabbage leather coral | ![]() | Sinularia brassica and Sinularia dura | Semi-aggressive | Easy | ||
Clove polyps, Daisy polyps[14] | Clavularia sp | Peaceful | Easy | |||
Devil's hand leather coral | ![]() | Lobophytum sp. | Peaceful to Semi-aggressive | Easy | ||
Finger leather coral | ![]() | Sinularia sp. | Semi-aggressive | Easy | ||
Jasmine polyps, Daisy polyps | Knopia | Peaceful | Easy | |||
Pulse coral, Pulsing Xenia | ![]() | Xenia sp. | Peaceful | Easy | An easy to care for coral known for its prolific asexual reproduction and polyps that actively move their tentacles in a pulsing motion. | |
Red chili coral | Nephthyigorgia | Peaceful | Expert | |||
Spaghetti leather coral | ![]() | Sinularia flexibilis | Semi-aggressive | Easy | ||
Star polyps[14] | Clavularia viridis, Pachiclavularia viridis, or Briareum violaceum (taxonomy uncertain) | Peaceful | Easy |
Common name | Image | Taxonomy | Reef safe | Care Level | Description | Max size |
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Feather star | ![]() | Himerometra robustipinna |
Common name | Image | Taxonomy | Reef safe | Care Level | Description | Max size |
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Abalone | Haliotis sp. | Yes | Easy | 12 cm (4.7 in) | ||
Arabian Cowrie | ![]() | Cypraea arabica | 10 cm (3.9 in) | |||
Astraea snail | Astraea sp. | Yes | Easy | 2.5–10 cm (1.0–3.9 in) | ||
Bumble bee snail[15] | ![]() | Engina mendicaria | Yes | Easy | 1.5 cm (0.6 in) | |
Cerith snail | Cerithium sp. | Yes | Easy | 3.5 cm (1.4 in) | ||
Gold ring cowrie | ![]() | Cypraea annulus | 5 cm (2.0 in) | |||
Lettuce sea slug | ![]() | Elysia sp., usually Elysia crispata | Yes | Moderate | A sacoglossan sea slug with folded parapodia (side appendages), that give it a lettuce-like appearance. They feed on algae, and incorporate algal chloroplasts into their cells. Color ranges from brownish to green, and can include blues, yellows, and pinks. | 5 cm (2.0 in) |
Nassarius snail | ![]() | Nassarius sp. | Yes | Easy | 2.5 cm (1.0 in) | |
Queen conch | ![]() | Eustrombus gigas | Yes, but may knock over loose rocks and coral. | 30 cm (11.8 in) | ||
Sand conch | ![]() | Strombidae | ||||
Sea Hare | ![]() | Aplysiomorpha sp., usually Aplysia sp. or Dolabella sp. | Yes | Expert | 4–10 cm (1.6–3.9 in) | |
Tiger cowrie, | ![]() | Cypraea tigris | 15 cm (5.9 in) | |||
Turbo snail | Turbo sp. | Yes | Easy | 5–10 cm (2.0–3.9 in) |
Common name | Image | Taxonomy | Reef safe | Care Level | Description | Max size |
---|---|---|---|---|---|---|
Aptasia | ![]() | Aiptasia sp. | No | A common pest species in marine aquariums which spreads rapidly and harms corals and invertebrates with their sting. Can sting fish, but fatalities are rare. Notoriously difficult to eradicate, but a number of organisms can be used for control, including peppermint shrimp and Berghia verrucicornis. | ||
Bubble-tip anemone | ![]() | Entacmaea quadricolor | With caution | Moderate | A relatively easy to keep anemone species, it is very colorful, and has distinctive bubble-like swellings on the tips of its tentacles. | 30 cm (11.8 in) |
Condy anemone[16] | ![]() | Condylactis gigantea | With caution | Moderate | Common anemone species in the aquarium trade. The base color is usually brown to white, often with color on tentacle tips. Many color variations exist, including magenta, purple, yellow, and green. | 15 cm (5.9 in) |
Delicate sea anemone[17] | Heteractis malu | With caution | Difficult | Also known as the malu anemone or white sand anemone. Color tipped tentacles reach 4 cm in length. This anemone should not be placed on a rock, it prefers a sandy substrate to bury its base in. | 20 cm (7.9 in) | |
Long tentacled anemone | ![]() | Macrodactyla doreensis | With caution | Moderate | 50 cm (19.7 in) | |
Magnificent anemone | ![]() | Heteractis magnifica | With caution | Expert | One of the most difficult anemone species to keep healthy in captivity. | 1 m (3.3 ft) |
Rock flower anemone | ![]() | Phymanthus crucifer | With caution | Moderate | ||
Tube anemone | ![]() | Cerianthus sp. | Yes | Moderate | Not a true anemone (actinarian), but a member of the order Ceriantharia. Can make a very colorful aquarium specimen, colored with pinks, purples and sometimes shades of fluorescent green. |
Common name(s) | Image | Taxonomy | Reef safe | Care Level | Description | Max size |
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Blue lollipop tunicate[18] | ![]() | Nephtheis fascicularis | Yes | Expert | 7.5 cm (3.0 in) | |
Golden sea squirt, Ink-spot sea squirt[18] | ![]() | Polycarpa aurata | Yes | Moderate | 15 cm (5.9 in) |
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