Sepioteuthis lessoniana 
Bigfin Reef Squid
Sepioteuthis lessoniana



   Sepioteuthis lessoniana are obligate predators who eat a variety of different marine organisms.  They are not dependent on different host organisms for their survival.  In order to eat, Sepioteuthis lessoniana will use their quick reaction time in order to catch their prey.  Two of their tentacles are used to capture the prey and bring in towards their mouth.  Sepioteuthis lessoniana have a radula which is used to tear their food apart into many different pieces.  This warm watered squid also has a beak which is used to tear apart organisms before letting it enter their mouth.  This beak can also be used to break shells if the prey item has one. 

    Sepioteuthis lessoniana have been known to eat as much as 30% of their body weight a day!  This squid is carnivorous and some favorite meals are many varieties of crustaceans, fish and shrimp. Theylook at the tentacles! eat only live organisms (important because Sepioteuthis lessoniana are frequently used in scientific studies within marine tanks).  If there is no live prey around, Sepioteuthis lessoniana will practice in cannibalism, however this is very rare.

  Once the prey is ingested through the radula, the food continues through the body.  Sepioteuthis lessoniana have a complete digestive system, meaning that the animal has both a mouth and an anus.  Nutrients are absorbed into the body through the stomach and intestinal walls.  Both the mantle and the digestive gland tissues are used as energy storage. 

The amount of Sepioteuthis lessoniana found in nature has increased a significant amount over the past thirty years.  This is though to be due to the fact that there has been an increased removal of animals who eat squid such as toothed whales and tuna. For more information on this global warming crisis and the affects on Sepioteuthis lessoniana please visit Australian Science.