Worst Marine Invertebrates

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So-called "Green Death Brittlestar," Ophiarachna incrassata. Scott W. Michael
Blue-Ringed Octopus, Hapalochlaena lunulata. Scott W. Michael
Cone Snails, Conus geographus. Scott W. Michael
Magnificent Sea Anemone, Heteractis magnifica. Scott W. Michael
Sally Lightfoot Crab, Percnon gibbesi. Scott W. Michael

[edit] Species to Avoid: Our Red List Criteria

This list of Invertebrates to Avoid (or to Buy with Eyes Wide Open) is designed to help the beginning to intermediate aquarist avoid bringing home the wrong reef animals.

Some of the livestock listed in this section can, in fact, make good aquarium inhabitants, but only under specific environmental conditions and/or in very large systems. The criteria we use in placing these species and groups on a red list include:

  • Grows too large for most home aquariums;
  • Is highly predatory or territorial and likely to kill and/or eat other fishes;
  • Is hard to feed or has a poor survival record in captivity;
  • Is banned in some areas and a threat to local native populations;
  • Finally, there are those animals that are a threat to their keepers and that do not make safe aquarium subjects under any circumstances.

[edit] Sea Anemones

[edit] Soft Corals

  • Carnation Corals
  • Colored Tree Corals

[edit] Stony Corals

[edit] Crustaceans

  • Horseshoe Crab
  • Sally Lightfoot Crab

[edit] Echinoderms

  • Green Brittle Star
  • Feather Stars
  • Crown-of-Thorns Starfish

[edit] Mollusks

[edit] More to Come

Best Marine Invertebrates

Reference: The 101 Best Saltwater Fishes
Image credit: SWM
Text credit: SWM
Facts about Worst Marine InvertebratesRDF feed
Image credit SWM  +
Reference The 101 Best Saltwater Fishes  +
Text credit SWM  +