marlin, common name for open-sea fish related to the sailfish and swordfish (family Istiophoridae) and prized by sportsmen. The best known is the blue marlin of the genus Makaira, found in the Gulf Stream as far north as Long Island. It may reach 1,000 lb (454 kg) in weight. The upper jaw of the marlin extends into a long spike with which it clubs the small fish on which it feeds. The striped marlin of the Pacific reaches a weight of 300 to 400 lb (135-180 kg); the paler white marlin of the Atlantic rarely exceeds 100 lb (45 kg). Marlins are classified in the phylum Chordata, subphylum Vertebrata, class Osteichthyes, order Perciformes, family Istiophoridae.

Any of four species (genus Makaira, family Istiophoridae) of deep-blue to blue-green marine fish with a long body, a long dorsal fin, a rounded spear extending from the snout (which it uses to club the fish it feeds on), and usually pale vertical stripes. They are highly prized for sport and food. Species range in weight from about 100 lbs (45 kg) to more than 1,500 lbs (700 kg). The Indo-Pacific black marlin (M. nigicans) has a distinctive, stiff pectoral fin set at an angle.

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Marlin is a census-designated place (CDP) in Schuylkill County, Pennsylvania, United States. The population was 640 at the 2000 census. It is a village of Norwegian Township. The village is the seat of government for the township.

Geography

Marlin is located at (40.680503, -76.244204).

According to the United States Census Bureau, the CDP has a total area of 0.9 square miles (2.3 km²), all of it land.

Demographics

As of the census of 2000, there were 640 people, 269 households, and 181 families residing in the CDP. The population density was 710.5 people per square mile (274.6/km²). There were 278 housing units at an average density of 308.6/sq mi (119.3/km²). The racial makeup of the CDP was 99.38% White and 0.62% African American. Hispanic or Latino of any race were 0.47% of the population.

There were 269 households out of which 33.5% had children under the age of 18 living with them, 53.2% were married couples living together, 8.2% had a female householder with no husband present, and 32.7% were non-families. 30.5% of all households were made up of individuals and 19.3% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.96.

In the CDP the population was spread out with 24.8% under the age of 18, 4.7% from 18 to 24, 28.0% from 25 to 44, 22.2% from 45 to 64, and 20.3% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 99.4 males. For every 100 females age 18 and over, there were 83.6 males.

The median income for a household in the CDP was $42,692, and the median income for a family was $51,106. Males had a median income of $41,000 versus $22,083 for females. The per capita income for the CDP was $19,122. None of the families and 4.9% of the population were living below the poverty line, including no under eighteens and 14.6% of those over 64.

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