Euprymna berryi
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| Sasaki , 1929 |
Euprymna berryi is a cuttlefish from the family Sepiolidae , the dwarf squid . Whether due to the small size of the animal, an English common name is hummingbird bobtail squid and a French sépiole colibri . Both translate as hummingbird cuttlefish .
description
Euprymna berryi is a small cuttlefish. The animals have different sizes depending on sex ( sexual dimorphism ), males do not grow larger than three centimeters, females reach a length of five centimeters. Overall, the animals have a rounded, compact body. Like all other real cuttlefish, they have ten arms, two of which are tentatively longer than the other eight. At the rear end of the coat there are two fin hems on the sides. Because the body is translucent, it has no basic color. It is densely covered with small, dark chromatophores , with the exception of the fin fringes, which only show them at the mantle attachment point. The calm color of the Sepia is a mixture of small black, steel-blue and green dots. A Schulp is only available as a rudiment .
distribution and habitat
Euprymna berryi is widespread in the tropical waters of the central Indo-Pacific . The species has been proven from Indonesia to the Philippines ; the holotype was caught off Honshu . Possibly the distribution area is much larger and includes the Andamans , the coasts of Sri Lanka and the Indian west coast, in these places some specimens were documented in 2007. The cuttlefish cultivates a benthic , highly water-based lifestyle, preferring sandy or similarly fine substrates, and has been found up to a depth of 107 meters. Too little data was available in 2009 to assess whether the species is threatened.
Way of life
Euprymna berryi is a nocturnal species of cuttlefish. The animals bury themselves in the sediment during the day. Burying them, which they can do very quickly, is also a defense strategy against predators. At night the cuttlefish chase after their prey, which mainly consists of small, benthic crustaceans. The species has a bean-shaped luminous organ in the gill cavity , which helps camouflage the animals. According to the principle of "stray light camouflage", the organ generates just enough light that the contours of the body are blurred by adjusting the brightness and removing the contrasts in the background, so potential predators have trouble visually recognizing the cuttlefish.
swell
Individual evidence
- ↑ a b c Euprymna berryi Sasaki, 1929 ( EN ) In: World Register of Marine Species . Flanders Marine Institute. Retrieved December 4, 2019.
- ↑ a b P. Jereb, Clyde FE Roper: Cephalopods of the world . In: FAO (Hrsg.): Cephalopods of the world, an annotated and illustrated catalog of cephalopod species known to date . Rome 2005, ISBN 92-5105383-9 .
- ↑ a b Richard E. Young, Michael Vecchione: Euprymna ( EN ) Tree of Life project, University of Hawaii / Honolulu (USA), National Museum of Natural History, Washington, DC, USA. 1996. Retrieved December 5, 2019.
- ↑ Sujit Sundaram and Miriam Paul Sreeram, First record of sepiolid squid, Euprymna berryi Sasaki, 1929 from the west coast of India, Journal of the Marine Biological Association of India, 2008
- ↑ a b Mark Norman: Cephalopods: A World Guide . ConchBooks, ISBN 978-3-925919-32-9 .
- ↑ Euprymna berryi in the Red List of Threatened Species of the IUCN 2009. Retrieved on 4 December of 2019.
