What Types of Environmental Conditions Do Jellyfish Need to Live?

Not all jellyfish are created equal. Species of jellyfish vary with environmental conditions. The open ocean is the common factor with saltwater species. Bodies of freshwater with access to saltwater contain smaller species and less lethal. Zooplankton populations (copepods and larval fish) play an important role in the environment for jellyfish as their food source.

  1. Ocean Temperatures

    • This jellyfish prefers warm waters.

      Ocean temperatures differ among the species. Some prefer tropical climates, others prefer the icy cold of Antarctic climates. Depths of the ocean vary for these remarkable creatures. Boaters have spotted jellyfish floating just beneath the surface while others cling to the coastlines or emerge from the deepest, darkest depths of the ocean.

    Size

    • A jellyfish played a starring role in the movie "Seven Pounds" starring Will Smith.

      The size and appearance can dictate the type of living environment the jellyfish prefers. The blue blubber jellyfish, the mangrove jellyfish, and the lagoon jellyfish are small, and favor harbors where water is not very deep. Another smaller version, the peach blossom jellyfish lives in freshwater close to shorelines.

      Species of the cnidarians (flowerlike appearance) and ctenophore (combs) groups prefer the deepest region of the ocean. This group of jellyfish is considered full of mysteries since they are rarely seen. The jellyfish inhabitants of the Antarctic and arctic regions avoid humans who are reluctant to enter the frigid environment.

    Blue Bottle jellyfish

    • Lighting the way, some jellyfish have a "glowing" appearance.

      The agility of this species outshines the rest. In the mid-depths of the ocean, a blue bottle jellyfish can thrust upwards to the water's surface and just as quickly return to the deep depths. Not all jellyfish have this ability for locomotion. Many simply ride the ocean's currents.

    Toxicity

    • Jellyfish are beautiful, transparent orbs that appear harmless, but can leave a lasting impression with one painful sting. Use caution when observing these invertebrates, as their tentacles can be quite toxic. If stung, quickly flush the area with seawater. This will lessen the painful stinging sensation. Seek medical attention as soon as you can.