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| Sea Urchin |
Sea urchin information with photos and videos
Sea urchins are small aquatic creatures found in the oceans of different parts of the world. Sea urchins belong to the family (Echinodermata), which closely relates them to starfish, crinoids and other members of the phylum. Sea urchins are characterized by the presence of a backbone that covers their entire body.
Sea urchins are small creatures and have a spherical body, ranging in diameter from 3 to 10 centimeters, and sea urchins can be black, brown, red, pink or purple, and we will discuss in this article some of the distinctive physical characteristics. a sea urchin.
The skeleton of a sea urchin:
The skeleton of a sea urchin, which consists of calcium carbonate plates fused together to form a solid skeleton, in order to provide protection to the organism from damage, and the spine contains wide stripes that help the sea urchin to camouflage itself or fight off predators, and its length. varies from 1 to 3 centimeters with an average width of 1 to 2 mm.
Sea urchin teeth:
This sea urchin has a set of five teeth that are located on the underside of the body, and as in all other living things, the sea urchin uses its teeth to eat and chew food, and the teeth remain throughout the sea urchin's life. and the arrangement of the teeth has a circular shape referred to in the name of Aristotle's lantern.
red sea urchin
Sea urchin feet:
The foot of the sea urchin contains transparent tubes, the length of these tubes is much longer than the animal's spine, and they serve different purposes, they help it to move, it is known as "tube feet" and has the following purposes :
* The sea urchin moves with the help of its tube feet.
* The movement of the feet is done by hydraulic pressure in order to pump water in and out of the tubes, and this allows the tube feet to move.
The sea urchin sticks to the bottom of the ocean with the help of its tube feet, which provides protection from waves and currents.
Its tube feet help it catch food particles.
* The tubes also help in the breathing process.
Sea urchins live at the bottom of the oceans.
Sea urchins live at the bottom of the oceans.
Sea urchin habitat:
Sea urchins have a great ability to adapt to different conditions, so they are found in oceans all over the world regardless of the type of environment and water temperature, and live on coral reefs, in rock pools and on exposed rocks. to waves, and are also found in the different depths of the oceans, the following facts reveal more information about the sea urchin's habitat:
For the most part, sea urchins thrive in areas where there are abundant food sources
Its tube feet help it to trap food particles.
* The tubes also help in the breathing process.
Sea urchins live at the bottom of the oceans.
Sea urchin habitat:
Sea urchins have a great ability to adapt to different conditions, so they are found in oceans all over the world regardless of the type of environment and water temperature, and live in coral reefs, rock pools and exposed rocks. to waves, and are also found in the different depths of the oceans, the following facts reveal more information about the sea urchin's habitat:
For the most part, sea urchins thrive in areas where there are abundant food sources.
There are large numbers of sea urchins in the coral reefs of Hawaii, Australia and the Caribbean.
* Sea urchin species can be found thousands of meters deep in the oceans.
Portalcidae is a unique family of sea urchins found in the deepest regions of the sea, in a dry trench, and this family was found thriving at a depth of 6,850 meters.
* Sterice nusneomyire, or Arctic sea urchin, can survive the freezing temperatures of the polar seas.
* There are rare species of sea urchin that can survive for several hours out of water, because they have a special resistance.
Although different species of sea urchins can survive in different types of different marine climates, a large number of them are found on the coasts of temperate and tropical regions. In addition, despite the ability of sea urchins to survive, they live in deep water, Sea urchins are found mainly near the surface due to the presence of photosynthetic food sources.
Sea urchin food:
Sea urchins are carnivores and plants, Sea urchins feed on plants and small animals in the sea, and mostly their food consists of seaweed and algae found on the surface of the oceans, and when sea urchins do not find their favorite food, various types of sea urchins turn to new types of food which may include dead animal remains, sponges, mussels, sea cucumbers and other small ocean creatures.
Sea urchins feed on a variety of food sources.
Sea urchin mating:
The mating method of sea urchins is sexual, and there are two different sexes, and sea urchins reach sexual maturity between the ages of two to five years, and the females release their gel-coated eggs into the water and the males release their sperm. The eggs are fertilized, and the fertilized egg becomes a larva.Also known as a plutio, the individuals (males or females) cannot be distinguished until they reach sexual maturity and release eggs and sperm.
Sea urchin adaptation:
The ability to adapt means that sea urchins are able to survive in unfavorable conditions, such as lack of food. In addition, sea urchins have characteristics that help them protect themselves from predators, and we will mention some of these characteristics:
The sea urchin has a high sensitivity to light, and the sea urchin can adjust the direction of its spine in response to shadows to be ready to fight off predators.
A sea urchin's tubular legs help it stick to the ocean floor, which helps it stay in one spot instead of being tossed about by ocean waves.
* The sea urchin can regenerate damaged or lost spines.
Sea urchins have a long lifespan that can extend up to a period of thirty years.
The red sea urchin is the longest-living type of sea urchin, as it can live two full centuries.
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