معلومات عن قنديل البحر بالانجليزي

معلومات بحث موضوع تعبير فقرة تقرير  برزنتيشن  نص مقال تقرير بحث انشاء  بالانقلش 

قنديل البحر (بالإنجليزية: jellyfish) (حيوان بحري منالرخويات يصنف في شعبة اللاسعات

قنديل البحر من أقدم الحيوانات الموجودة على الأرض فهو يوجد منذ أكثر من 500 مليون سنة

يتغذى بشكل عام على بيوض ويرقات الأسماك كما أنه يتغذى على الهائمات الأخرى من العوالق البحرية الحيوانية

 قنديل عملاق ترجمة و معنى قنديل بالإنجليزي  تعبير انجليزي عن حيوان بحري قنديل البحر في الإنجليزية موضوع بالانجليزي عن حيوان بحري أريد موضوع تعبير عن حيوان باللغة الإنجليزية مهم حيوان بحري اسم قنديل كلمة قنديل  بحث عن الحيوانات البحرية باللغة الانجليزية

موضوع انجليزي عن الكائنات البحرية قنديل الضوء قنديل مصباح قنديل الزيت معلومات عن قنديل البحر

A JELLYFISH

Physical description

The jellyfish is 98% water and 2% dry matter.

It is formed of a cap called umbrella and a vertical axis, the manubrium, fixed in the center of the lower face. At the edge of the umbrella are attached filaments.

The movements of the jellyfish are slow. The jellyfish is driven by the ocean currents and the contraction of the muscles of its parasol propels it by leaps.

There are several hundred species of jellyfish. The smallest species is only a few millimeters in diameter. The largest, found in arctic seas, is 2 meters in diameter with filaments up to 40 meters in length.

His place of life

The jellyfish spends its entire life in open water. It is found in all the hot and cold seas of the planet, on the high seas and on the coasts. Only rare species live in freshwater.

His diet

The majority of jellyfish species are carnivorous.

The jellyfish does not pursue its prey, it waits for it to throw itself into a trap stretched by its tentacles. The mouth of the jellyfish is under its parasol and its filaments carry the food: shrimps, small crabs and small fish.

His reproduction

Jellyfish breed when they die. When a jellyfish is killed, it releases its sperm (if it's a male) and these spawn in the ocean after encountering their female counterparts. The fertilized eggs become larvae called "planula" which, after falling on the bottom, are fixed on a support and develop into polyps.

A major change must occur (eg change of temperature, oxygen, thunder) so that the jellyfish thus formed can be released.

His life expectancy

The jellyfish is the only living being whose aging is not understood. Thanks to its regenerative abilities, scientists consider it as ... immortal!

Nevertheless, the jellyfish can be killed by its predators: the Luth turtle (of which it is the favorite dish), the moon fish and the bluefin tuna. In Asia, the man consumes dried jellyfish.

Particular signs

Jellyfish sting, thanks to many stinging cells scattered in the epidermis of their tentacles. Even though the jellyfish has been dead for a long time, stinging cells remain active. You should never touch a jellyfish, even beached.