Komerční prezentace
Registrace uživatele

Přihlašte se k odběru informací, novinek, získejte přístup do diskuzního fóra.

Vesmír č. 10
Vesmír č. 10
Toto číslo vychází
2. 10. 2017
Zdarma jedno celé číslo Vesmíru v pdf.
• Říjnové číslo Vesmíru

Hlavonožci tisíce tváří

Thousand faces of Cephalopods by Martina Balzarová.

Cephalopods are very interesting creatures living in marine environment. One of the very unique is octopus Thaumoctopus mimicus. It was found in 1998 and can resemble more than 15 different animal species (including sea snakes, lionfish, flounder, mantis shrimps, stingrays etc.). Because of this ability the octopus is often nicknamed mimic octopus. Another interesting cephalopod is coconut octopus (Amphioctopus marginatus), which makes shelters from coconut shells or from various mussels. The smallest and deadliest cephalopods are tiny octopuses from genus Hapalochlaena. They have blue rings on their yellowish body, but they display them only in the case of being threatened or as a warning. Fire sepia (Metasepia pfefferi) is poisonous and it displays this characteristic by vivid coloration. Even the small hatched juveniles are able to display this warning coloration. One of the oldest cephalopods is Nautilus pompilius with its nice and colorful shell, which protects the body. The shell consists of septas filled with gas and it helps to manage the buoyancy.