In addition to resident plants and animals like killifish, tarpon (Megalops atlanticus), snook (Centropomus undecimalis), and mangrove snapper (Lutjanus griseus), mangroves provide a safe haven for nearly every kind of reef fish and many invertebrates at some time during their life.
The Cassiopea (upside-down jellyfish) are also found in mangrove ecosystems. The medusa usually lives upside-down on the bottom, which has earned them the common name. Where found, there may be numerous individuals with varying shades of white, blue, green and brown. They love to be in the shallow where there is little to no current so they can soak up the sun to the fullest. They live in symbioses with an algae type. This algae is photosynthetic. The algae are observing the sunlight and out of this process sugars are made. The algae will deliver the sugar again to the jellyfish and in return the jellyfish is providing the algae with a safe forever home.