It is important not to buy dry starfish or handicrafts made from them. It is best to enjoy them in their natural environment….
QUINTANA ROO — Undoubtedly one of the strangest animals in both its behavior and physiology is the starfish. There are just over 1900 species of this animal that are distributed around the world. They can live from the intertidal zone to 6,000 meters deep exclusively in marine waters. Each one has characteristics totally different from each other.
The most common species in Quintana Roo, the star cushion (Oreaster reticulatus), measures from 30cm up to 50cm from tip to tip, It is considered an adult star from the maximum radius of 12 cm, and its coloration at this age is red, pink or orange, whereas the young ones have greenish colors and with spots that help to camouflage themselves. Most stars are made up of a central part surrounded by 5 arms that have the facility to regenerate if they are injured.
Its hard structure is formed of calcareous plaques, a kind of calcium, which has holes through which leaks the gills, which extract oxygen from the water, allowing breathing. These types of stars can’t breathe out of the water.
They are found mainly on sandy, muddy surfaces, in marine grasslands or near mangroves, the latter shelter commonly used in young stars.
Its displacement is totally out of this world, because inside its hard structure, it keeps a vascular system that is under pressure, and has hundreds of small feet full of water that allows movement. In the cushion star, it is a slow and exclusively underwater movement.
They eat small invertebrates, crustaceans, mollusk and they even eat other starfish. To do this, they remove their stomach as it has surmounted their prey, releasing their gastric juices to be able to digest the soft tissues. On the other hand, the main predator in adulthood is people, and in some areas Triton snails. However, in the young age, they have many more predators, for example, seagulls.
And finally their reproduction also depends totally on the species, there are some that are hermaphrodite, others that change sex with age and in the case of the cushion star, there are male individuals and female individuals. However, Biol. Vanessa Francisco, Field Officer of the National Park of the Arrecife National Park of Puerto Morelos, tells us that it is impossible to know their sex by observing them, the only way is to witness the moment in which each one expels the sperm and the eggs respectively.
This fertilization occurs entirely in water, unlike other species, independently releasing the gametes. When the egg is fertilized a larva is formed that has mobility and tends to be fixed near the adults of the same species, finally to undergo a process of metamorphosis that turns it into a starfish.
more recommended stories
Profepa rescues jaguar without fangs or paws in Central Mexico
The Federal Prosecutor for Environmental Protection.
The Impact of President Trump on Re-emerging Markets
With his plans to build a.
Crime is prevented with education in Mérida, Yucatán
Municipal police will initiate a training.
On his 82nd birthday, Pope Francis gives out 3,000 ice creams to Rome’s poor and homeless
According to The Local Italia, Pope.
OPINION: There are obvious signs of a crisis with López Obrador as president
Enrique Campos Suárez journalist, politics expert,.
April 23: World Book and Copyright Day
April 23rd is a symbolic date.
Mexico holds its first presidential debate for July election
MEXICO CITY — According to the.
Yucatecan food caused a big sensation at Tianguis Turístico 2018
Cochinita pibil, one of the most.
Peña Nieto signed the declaration of Special Economic Zone of Campeche and Tabasco
On April 17, President Enrique Peña.
The Mulsay Zoo, long forgotten by the people and authorities of Mérida
Residents of western Mérida are sad.