The seashore of California has been a place of beauty, wonder, and interest. Together with this beauty of the place, are the organisms that live and reside in the area. Many species are intertidal or shallow subtidal inhabitants. These species are striking to the eye that catches attention of those who look at them. One of those marine organisms is the Seriola lalandi or commonly known as the California yellowtail. This specie can be found from the surface of the ocean to a depth of about 228 feet. Seriola lalandi: The Yellowtail

Natural History Anything that is abundant in the area is the primary food of the yellowtail. During day time, they are an active predator. Their common foods are the red crabs, anchovies, squid and most of the small fishes that are present on the area. They spawn on the month of June until October. Upon reaching two years of their lives, they become mature sexually. And upon reaching 3 years of age, they are ready to produce eggs. Dependent on the weigh of the yellowtail are the capacity to produce eggs.


450,000 eggs can be produced by a yellowtail which weighs of about 10 pounds. However, a number of eggs of more than a million can be produced by a yellowtail weighing about 25 pounds. Description The yellowtail has an elongated body, a bit compressed, and is narrowing to the sharp snout and the slim tail. A conical shape more or less of the head and the above color of the body ranging from olive brown to brown, and the side of the body having a dark stripe, and the fin’s color is yellowish.

The dark stripe on the side of the body of the yellowtail, and its tail being yellow profoundly forked, make it easier distinguishing yellowtail from the other fishes. The largest size of the yellowtail ever been recorded is 5 feet, weighing 80 pounds, which is found on the waters of California Range From Chile, the yellowtail can be found in the southern Washington where the Gulf of California was situated. Yellowtail can also be found on the surface of the ocean’s and 228 feet below the surface. They had inhabited California, from the Point Conception and to the Coronado Islands, Baja California.

Age and Growth There is no concrete method used to determine the ages of the yellowtails on the early times. The concept used during the early attempts upon distinguishing the ages are typically trial and error. However, upon doing several researches, results yield to a conclusion with which become the basis in determining the ages of the yellowtails. The scales of the yellowtails are cycloid, often oblong, and thin. The dermis of the skin of the yellowtail is only a little exposed due to the scales fixed deeply into it.

There are circular rings which divide the scales’ outer surface are the one’s examined. Looking at a simpler way, the way to determine how old a tree is is the same way as the circular rings on the surface of the scales projects. The data gathered based on the analysis of the age of the yellowtail were used in determining their rate of growth. There is a variation on the size dependent on the ages of the yellowtail. But there is a large range in size during the first part of aging, which the researchers find to be composed of twelve parts of aging.