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Critter of the Day Common Name: Starry Flounder Scientific Name: Platichthys stellatus

Critter of the Day Common Name: Starry Flounder Scientific Name: Platichthys stellatus Phylum Chordata; Class Osteichthyes Draw and note unique charateristics. Osteichthyes. Gas Exchange and Osmosis Regulation. GaS eXcHaNgE. Respiratory system controls gas exchange

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Critter of the Day Common Name: Starry Flounder Scientific Name: Platichthys stellatus

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  1. Critter of the Day Common Name: Starry Flounder Scientific Name: Platichthys stellatus Phylum Chordata; Class Osteichthyes Draw and note unique charateristics

  2. Osteichthyes Gas Exchange and Osmosis Regulation

  3. GaS eXcHaNgE • Respiratory system controls gas exchange • Oxygen uptake with carbon dioxide released. • When carrying eggs, they have a fluid-filled sac that allows gas exchange • Air comes in through the gill slits and transfers into the lungs

  4. Osmosis Regulation • They have a greater concentration than their body fluids so they gain salts by diffusion and lose water by osmosis • can obtain salts from their food; many also have salt-absorbing cells in their gills and mouths

  5. Class Osteichthyes [Bony Fish] Feeding and Defense Mechanisms

  6. Feeding • Are carnivorous, few are herbivores, and some filter feeders • Eat all sizes of plants and animals (according to their size) • Jaw shape and size determine what they eat. • Common foods: annelid worms, marine snails, mussels, clams, squid, crustaceans. • Many select weak, injured, dying prey. • Use hearing to detect prey • Have sharp teeth to tear prey to SHREDS!!!! >:)

  7. Defense • Skin is covered in protective scales (“armor” plating). Bones (cartalidge) around brain serve as shield. • Poison • Have lots of teeth, can breathe without moving and have excellent sense of smell. • Camoflauge • Countershading (dark back, lighter sides, light belly help fish hide) • Schooling • Fast Swimming

  8. Example of Adaptations for Defense • Clownfish • Live in anemones unharmed • Some scientists theorize that clownfish protect themselves by stealing thechmical identity of the anemone • Coat body in naturally produced mucs (most fish produce it to help them swim faster) • Enter anemone, enduring non-lethal stings • Roll around in anemone mucus, allowing it to mingle with their own • Can now “sneak” into anemone and live there undetected

  9. Pointless But Oh, So Necessary Osteichthyes originated from the Greek words OSTEON, which means “bone” and ICHTHYES, which means “fish”.

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