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Starfish
Also known as sea stars, these echinoderms are 2,000 species strong and found in seas and oceans all over the world. They can vary in size from less than half an inch to more than four feet across.
1,388 Questions
Why do sea animals belong in a group?
this is an unclear question to answer. for protection would be my answer. but to give a completely true answer requires knowing what sea animal(s) are we talking about.
Why did they make jesus were a crown of thorns on his head?
They did this because all Jews worshiped Jesus as a king. The crown of thorns was a joke because He was the King of Jews. The sign on the cross also had the same meaning
Do seastars have a backbone and are they considered animals?
they are in kingdom animalia but it doesn't have a backbone
How are starfish and horses different?
Starfish and Horses are different by: Starfish live in water and horses don't, Horses run and starfish don't. ( That is mostly all I got)
When was the first cushion made?
The very first cushions originated in Asia, before the birth of Jesus, for wealthy Asian men and royalty. However, due to international trade, the idea of the cushion began to move west. Themed cushions began appearing in the 1860's - this is when Christmas cushions began appearing. In 1858, Macy's opened, and being one of the first department stores with ground floor windows, it began creating window displays to entice shoppers. In the mid 1860's, a revolutionary Christmas display was used, and this is when Christmas cushions began coming into fashion, as they were used in this piece. They featured images such as candles and stars, which were very traditional Christmas ideas. American households soon began buying them, and indeed creating them themselves to give as gifts. The idea has been widely used ever since.
How long can a starfish go without food?
A sea star, also known as a starfish can go without food for about 60 minutes or so.
How do starfish maintain stable conditions?
Because when one of their legs get eaten the leg grows back surprisingly fast and they have hard & rough shells.
How does this starfish contribute to the destruction of the corals?
by killing the corals and eating it
Do starfish live in the Arctic or the Antarctic?
Yes, Starfish do live in the Antarctic. They live anywhere that there is not fresh water.
What kind of food do starfish eat?
Most starfish eat clam, oysters, and mussels. There are a few species that eat sponges, plankton and coral. There are even some species that will go outside of the water to find decomposing plants and animals.
The concept clade is commonly defined as "an ancestor and all its descendants.
However, this definition states that the concept terms a class (i.e., clade) of a kind of set (i.e., common ancestors and all their descendants), meaning that the concept corresponds to the concept "infinite set" in set theory, and thus also corresponds to the conceptual contradiction that in logic is known as "Russell's paradox". It means that the concept clade actually terms a contradictory abstraction, that is, a paradox. This fact may be difficult to understand, since it means that the class has a solution for each and everyone, that is, subjective solutions for each and everyone, but lacks a single non-contradictory (unambiguous, or objective) solution per definition. Fact is thus, however, that the concept terms a subjective illusion (dream), i.e., "objective subjectivity".
What is a small part of the ocean is called?
A sea
a portion of ocean that is enclosed or partly enclosed by land
What are some human interactions with starfish?
Humans interact with them by exfoliate them exfoliate means to remove the surface of bone or skin in scales or laminae.
feet
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T2K-4H8MP53-1&_user=1515455&_coverDate=11%2F30%2F2005&_rdoc=1&_fmt=full&_orig=search&_cdi=4921&_sort=d&_docanchor=&view=c&_acct=C000053262&_version=1&_urlVersion=0&_userid=1515455&md5=5caa67d65840945d332fac07a97a3202#secx9
== Tube feet activities of walking individuals of A. pectinifera with respect to speed of movements and arm orientations were observed to estimate their contributions to the obstacle avoidance behaviors. The experimental tank had white acrylic walls and a transparent bottom and measured 35 cm in both width and depth, and 15 cm in height. The tank was filled with seawater to a depth of 5 cm and was illuminated using two 10-W fluorescent lamps so that there was no shade inside; this was because shade may elicit directed movements of starfish (e.g., Yoshida and Ohtsuki, 1968). Furthermore, there was no source of odor that may attract the starfish, allowing us to observe tube feet activities without a directive stimulus. A specimen was put in the center of the tank and allowed to move freely. A CCD camera was set beneath the tank to record tube feet movements. To obtain clear images of the tube feet, the camera frame was set to a rather small area measuring 21.5 cm × 16.5 cm. Thus, A. pectinifera would move out of the frame within a few minutes and long data sequences could not be obtained. When a starfish walked to the end of the tank, it was replaced at the starting position by hand. When the experimenter touched the specimen, special care was taken not to handle the arms, because touching them may cause retraction of the tube feet, which may eventually cause a direction change in the specimen's movement. Still images with a resolution of 640 × 480 were captured from the videotape recorded at a rate of four frames per second. As captured images divided an area of 21.5 cm × 16.5 cm into 640 × 480 pixels, the minimum object size was approximately 0.34 mm. This resolution was not very fine, but was sufficient to allow detection of the tube feet, which are approximately 1.2 mm in diameter. The sampling rate was also sufficient to allow observation of movements of A. pectinifera, although movement itself was not analyzed in the present study. From each image, the positions of the tips of arms and the mouth located in the center of the disk were determined. It is possible to calculate the approximate orientation of the rays from these data. The number of tube feet was counted to measure locomotion activity. When an A. pectinifera remains still and does not move, the tube feet retreat into the crevices under the arms and the number of detectable tube feet is relatively small. In contrast, when activity of A. pectinifera is rather high and the starfish moves rapidly, many tube feet can be observed. == When an individual was placed in the center of the observation tank, it sometimes became inactive with the tube feet retreated into the crevices under the arms, which makes it difficult to observe all of the tube feet. On the other hand, when a starfish is in a highly activated state, all the tube feet are moving and could be counted easily. Thus, the number of tube feet observed, indicating the number of working tube feet, can be used as an index of the activity of the starfish. When the tube feet show synchronous movements, the starfish shows relatively smooth locomotion (Koh and Lane, 1998 B.C.A. Koh and D.J.W. Lane, Locomotory coordination and the podia-ampulla system in Stellaster equestris(Asteroidea: Goniasteridae). In: R. Mooi and M. Telford, Editors, Echinoderms: San Francisco, Belkema, Rotterdam (1998), pp. 259-263.Koh and Lane, 1998). However, some arms may have more difficulty in maintaining synchrony, because the tube feet are arranged in two lines along the crevices running along the arms. If a tube foot steps toward the tip of arm or the mouth, i.e., along the ray, it will collide more frequently with other tube feet. In contrast, if a tube foot moves perpendicular to the ray, it has the least chance of collision and it will make a maximum contribution to movement of the arm.
