Lumen Siren Fish Nicholas Gargaro


  • Common name: Lumen Siren Fish - Uses beautiful bioluminescent lights to attract its prey in much the same way the Sirens of Greek Mythology attracted their prey using their beauty and voice.
  • Scientific Name : Lepto Decoras- Light, Beauty- (Beautiful Light)- Produces beautiful light to attract prey.

Ocean Zones

The Lumen Siren Fish Lives in 4 ocean zones

  • Pelagic- everything above the Benthic Zone
  • Neritic - Area over the continental shelf that cover 10% of the ocean, but has 90% of sea life.
  • Euphotic - Area that receives lots of light and oxygen, has low temperature and pressure, and has 90% of marine life on earth.
  • Epipelagic - between 0m and 200m


The Lumen Siren Fish lives in various spots of the Great Barrier Reef in Australia. Its Specifically lives in large cracks and crevices, of the rocks and coral deep down along the drop-off of the reef.

  • Biotic Factors - Various fish species, corals, crustaceans, sponges, mollusks, plankton
  • Abiotic Factors - Water , rocks, and sand

Physical Traits and Adaptations to Environment

  • Dark Body - the main body is dark to be used as a work of camouflage at night so it is unable to be seen.
  • Females are larger growing up to 2 feet in length and have a light blue glow
  • Males are smaller growing up to 1 foot and tend to have a darker purple glow
  • Bioluminescent tendrils - Spread out and light up in spots to mimic schooling plankton, crustaceans, or small fish, to attract prey. They are coated in a thick poisonous secretion that paralyzes unsuspecting prey on contact. These tendrils are also able to fully light up in order to scare away predators that are immune to the poison such as the Banshee Eel, Raptor Shark, and other Lumen Siren Fish.
  • Large Red Eyes - used as a sort of built in night vision for locating prey to eat or prey already effected by the poison.
  • Large Barbed teeth - used to rip and hold on to flesh of other fish no matter how hard they thrash around.


  • Lumen Siren Fish primarily move around at slow/moderate speeds, using their pectoral fins, while hunting. When in danger or pursuit of prey, they kicks hard and fast with its caudal fin. When doing this it achieves great speeds and uses its dorsal, pectoral, and pelvic fins to make fast, sharp turns.


  • As they swim, Lumen Siren Fish take in water through their mouths and it comes out of their gill flaps
  • As the cool, ocean water flows through the gills, the oxygen in the water is filtered out and absorbed into the fishes body.
  • When at a resting position, they can suck in large gulps of water at time to constantly be filtering out oxygen despite not moving.


  • Lumen Siren Fish have a very slow digestive track and tend to eat only a certain amount before returning to their dens and digesting the food in their sleep.
  • Nocturnal Hunters
  • During the day, these fish sleep in their dark dens hidden in the coral and rock of the reef, deep down towards the bottom of the drop-off, but at night they come out to very top of the reef where the rest of the nocturnal hunters are to feed.
  • They primarily feed on other fish that happen to be paralyzed by the poisonous tendrils, no matter what species it is, it will be eaten.
  • This fish is actually quite bold. When it is not able to catch any food with its tendrils, it uses its night vision to search for and fish in the surrounding area. The first thing it lays its eyes on, it goes after. This includes, but not limited to: jellyfish, parrot fish, anemones, urchins, rays, eels, grouper, giant trivially, sea cucumbers, shrimp, crabs and sharks.
  • When in pursuit of prey, it will bite down on them using its barbed teeth and not let go until it rips out a chunk of flesh the size of its mouth. This is why large circles and chucks of flesh are missing form the fins and bodies of sharks and other marine animals.
  • The Lumen Siren fish is sometimes known as "The Glowing Tiger Shark" and "The Australian Reef Piranha", due to it eating anything that it can get its jaws on.


  • When the Female Lumen Siren Fish reach sexual maturity or it's matting season , she spawns her eggs in the back of their dens and then completely neglects them. She does not seem to care what remotely happens to them. All that she has on her mind is whats her next meal.
  • When Male Lumen siren Fish reach sexual maturity or it's mating season, they search out a female. Once they find a female of his liking, he will follow her back to her den, be careful no to be spotted. Once e fins her den, he will wait for night to fall and for the female to leave her den in search of food. Then he will sneak in and fertilize her eggs when she isn't there and then leaves.
  • However, if the female returns before the male leaves, she will not view him as a male fertilizing her eggs, but as a free meal.
  • Towards the begging of conception, all eggs appear to be a dark purple, but 10 days before they hatch, they glow they color of the corresponding gender they will be. This leaves them extremely open to predators, including their own mother.
  • If the mother hasn't already eaten the eggs, the n the females tend to hatch 10 minutes or so before the males do. in that time the females will eat the male eggs in order to gain strength. As soon as the males hatch, all remaining larvae will rush out of the den and scatter into the current, taking them around the reef.

Self Defense

  • When hunting, it uses its tendrils to paralyze both predators and prey.
  • When faced with larger predators threatening to eat it, the Lumen Siren Fish starts off by making quick circles in place as an attempt to whip the predator with its tendrils and scare it off with the pain from the poison if it isn't paralyzed. If that doesn't work, the Lumen Siren Fish will flare up its tendrils brighter then it normally would be, flare its gill flaps and operculum with the same bright glow, as well as glowing from the marks on its body, and from its mouth. this is used as an attempt to scare off the predators by showing off a ferocious, monstrous face that could potentially hurt the predator.
  • However, because it is digesting its food in its sleep during the day, and actively creating the poison takes up so much energy, while it sleeps, it slows down the production of the poison. This makes it almost defenseless, as predators could eat it unsuspectingly and the predators would only feel a sharp sting instead of full paralysis.

Plankton, Nekton, or Benthos

  • The Lumen Siren Fish is a Nekton organism
  • It actively swims all over the entire reef and can actively maneuver as free as it wants.

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