During the last 20 years, a series of studies has suggested trends of increasing jellyfish (Cnidaria and Ctenophora) biomass in several major ecosystems worldwide. Some of these systems have been heavily fished, causing a decline among their historically dominant small pelagic fish stocks, or ...
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Jellyfish feed on shrimps, fish and other jellyfish. Some types of jellyfish also eat small se a turtles.认一认1. plankton /'plaenktan/ n.浮游生物 2. transparent /traens'paerant/ adj. 透明的译一译水母水母不是鱼类。 它们是浮游生物。 它们没有头、 脑、眼睛和耳朵。它们的身体就像透明的...
The reefs are close to shore and offer lots of small hiding spaces for tropical sea life (just watch out for the jellyfish). Sandy Allen, AFAR Media, 10 Jan. 2025 The jellyfish is only about 4 inches across and boasts a bright red cross in its center. Monica Cull, Discover Magazine,...
1.any stinging, jellylike marine cnidarian of the classScyphozoa,living in the developmental stage as a tiny attached polyp and in the adult stage as a large free-floating medusa with trailing tentacles. 2.an indecisive or weak person.
Jellyfish use tentacles with stinger cells to catch their prey, typically plankton and small fish. (The exact prey depends mainly on the size of the jellyfish.) The tentacles transport the prey they killed with their stingers to the mouth and the jellyfish promptly devours the animal. It is...
Since it is carnivorous Box jellyfish primarily feeds on small fish and zooplankton. They can travel at a speed of 1.8 m/s. It also preys on tiny invertebrates such as bait fish and shrimp. Lifespan It has a shorter lifespan of less than a year. ...
They aren’t actually fish. They can make copies of themselves. And some older ones can become young again.
The main characteristic of jellyfish is the presence of stinging cells in the tentacles. Cnidocytes are diagnostic of the Cnidaria and are usually in the ectoderm. These cells have organelles that contain venom-bearing harpoons, the nematocysts. Triggered by touch or chemical cues, the harpoon ...
Their diets are as diverse as the areas they inhabit. Jellyfish prey upon small fish, plankton, crustaceans, and sometimes other jellyfish. Cold Water Jellies Warm Water Jellies Lesson Summary Register to view this lesson Are you a student or a teacher?