Staghorn Coral Barramundi Staghorn Coral, Acropora cervicornis, is a The Barramundi, Lates calcarifer, is found in branching, stony hermatypic coral that forms reefs. coastal waters, estuaries and lagoons, and is a It is very common in the Atlantic Ocean and popular game fish. They can be susceptible to skin Caribbean Sea. As with all hermatypic coral, it uses parasites. symbiotic algae to obtain energy.

Barnacle Sockeye Salmon Coronula diadema is a barnacle that burrows into The Sockeye Salmon, Oncorhynchus nerka, is an the skin and blubber of whales. They do not harm anadromous fish that is a popular game fish. It is the whales, but do benefit from having a habitat also frequently farmed in mariculture facilities, where nutrients are available. where is can be susceptible to parasites.

Magnificent Sea Anemone Harlequin Sweetlips The Magnificent Sea Anemone, Heteractis The Harlequin Sweetlips, Plectorhinchus magnifica, is found in the Indo-Pacific and is chaetodonoides, is fish that inhabits coral reefs. common to coral reefs. It is frequently found with Adults are often solitary, but they do engage in various species of anemone fish, which bring them relationships with cleaner fish. food and supply nutrients to the anemone.

Pineapple Sea Cucumber Killer Alga Thelenota ananas, the Pineapple Sea Cucumber, is Killer Alga, Caulerpa taxifolia, is an invasive the frequent home of fish that back into its anus. species. This alga, like others, are used in a wide The sea cucumber is capable of regeneration, so no variety of symbiotic relationships. One particularly long-term harm comes to it. The fish, however, is curious one involves chloroplasts being able to escape and hide from predators. sequestered to allow the consuming organism to perform photosynthesis.

Giant Oceanic Manta Ray Bioluminescent Bacteria Manta birostris, the Giant Oceanic Manta Ray, is Vibrio fisheri, a bioluminescent bacteria, can be the largest species of ray. The largest of these found inside other creatures that use it to produce species can reach over 5,000 pounds. They, like light. It benefits from this relationship by having a other rays and sharks, can serve as hosts for suitable habitat. commensalistic fish that feed on their scraps.

Hawaiian Bobtail Squid Yellowtail Amberjack Euprymna scolopes, the Bobtail Squid, incorporates The Yellowtail Amberjack, Seriola lalandi, is a special bacteria into two special light organs. This mainly pelagic fish that forms large schools. They allows the squid to countershade and can be susceptible to gill parasites. communicate with others.

Gill Fluke Pinhead Pearlfish The Gill Fluke, Zeuxapta seriolae, is a flatworm that The Pinhead Pearlfish, Encheliophis Boraborensis, is lives on the gills of fish and feeds on blood. an uncommon species of pearlfish. These fish are Infections can cause emaciation, lethargy and known for their relationship with sea cucumbers. mortality. The pearlfish lives within the anus of the sea cucumber, doing no long-term harm.

Sacoglossa Sea Slug Common Remora This Sacoglossan Sea Slug, Oxynoe olivacea, The Common Remora, Remora remora, has a demonstrates kleptoplasty, which is a symbiotic modified dorsal fin that acts like a suction cup. event during which algae is eaten and the plastids This allows them to attach to other fish for a free are stored near the skin for photosynthesis. ride, allowing them to feed on scraps.

Decorator Crab Sponges The Decorator Crab, Moreiradromia antillensis, Sponges (phylum Porifera) are sessile animals attaches other organisms to its shell for whose shape is adapted for maximum water flow, camouflage. These organisms can include allowing them to filter feed. They will grow on a seaweed, kelp, sponges and anemones. wide range of surfaces, including rock, coral, man- made structures, and even the shells of other animals.

Skin Fluke Humpback Whale The Skin Fluke, Benedenia seriolae, is a flatworm The Humpback Whale, Megaptera novaeangliae, is that lives on the surface of a fish and feeds on skin a baleen whale found throughout most of the cells. They have a circular organ that acts like a world’s oceans. As with most whales, they are suction cup to attach to the fish. Heavy infections susceptible to ectoparasites and commensalistic cause irritability, anorexia and mortality. hitchhikers.

Bluestreak Cleaner Wrasse Orange Clownfish The Bluestreak Cleaner Wrasse, Labroides The Orange Clownfish, Amphiprion percula, is a dimidiatus, inhabits areas of the coral reef with small marine fish that inhabits lagoons and large fish populations. It feeds on crustacean seaward reefs. They are well-known for their ectoparasites and mucus of other fish. relationship with anemones, where they find protection from predators and competitors.

Sea Lice Zooxanthellae Sea Lice, Caligus bonito, are copepods that live on Zooxanthellae are single-cell plants that live in the the skin of fish and feed on the epidermal tissue tissues of animals. There are many species of and blood of fish. They are often found on zooxanthellae, all within the genus Symbiodinium. anadromous fish, although they cannot survive in They are most commonly associated with reef- freshwater. forming corals.