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Fascinating Fish: Cold-Blooded Vertebrates of the Oceans and Rivers

Dive into the underwater world of fish, cold-blooded vertebrates that breathe through gills and move with fins. With over 30,000 species, fish come in various shapes and sizes and adapt to different environments. Freshwater fish maintain body salt levels, while saltwater fish regulate water concentration. Fish possess taste buds and a keen sense of smell. Discover the Philippine island goby, the tiniest fish, and the immense whale shark, reaching up to 50 feet in length and 15 tons in weight.

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Fascinating Fish: Cold-Blooded Vertebrates of the Oceans and Rivers

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  1. GENERAL CHARACTERICTICS • Fish are cold-blooded vertebrates that breathe with gills and move with the aid of fins. • They have the most numerous vertebrates with more than 30, 000 species. • All fish must maintain proper levels of salt and water in their bodies through osmosis. • Freshwater fishes: Body salts are higher in concentration than surrounding water • Saltwater fishes: Surrounding water has higher concentration than their bodies

  2. Most fish are able to react to changes in water pressure, temperature, currents and sounds. • Fish have taste buds in their mouth, on their lips and on their body and fins. Some are on their barbels (whisker-like projections around their mouth) • Has highly developed sense of smell

  3. Philippine island goby (Pandakapygmea) The smallest fish. Only 1/3 or ½ inch long.

  4. Whale Shark (Rhincodontypus) The largest fish. Average size is 25 feet long. Grows about 50 feet and weigh up to 15 tons.

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