Fish
Examples
Carcharodon carcharias (bottom left), Manta birostris (bottom middle), Pterois miles (bottom left)
Carcharodon carcharias (bottom left), Manta birostris (bottom middle), Pterois miles (bottom left)
Evolutionary Milestones
Fish posses seven evolutionary milestones: eukaryote, tissues, bilateral symmetry, body cavity, enclosed body cavity, hollow nerve tube, and backbone.
Habitat
Fish live in freshwater and saltwater.
Anatomical/ Structural Features
Fish have a backbone. They breath with gills. They have a closed circulatory system and a two chambered heart. Most have paired gills and fins. They are coelomate with endoskeleton. Most fishes have jaws. Most have scales.
How do they acquire nutrients
Fish are heterotrophs. Fish can be herbivores or carnivores.
What do they eat
Fish eat various organisms that live in the water.
What eats them
Predators of fish include other fish, mammals, and some aquatic crustaceans.
Symmetry
Fish have bilateral symmetry.
Mobility
Fish get around by swimming.
Reproduction
Fish reproduce sexually mostly by external fertilization but few reproduce by internal fertilization.
Development
Most fish go through these following stages in their life cycle: eggs, larval, fry, juvenile, adult, spawning.
Other Information
Fish have a swim bladder that allows them to control their depth. They can detect the slightest movement in the water because of their lateral line system.
Fish posses seven evolutionary milestones: eukaryote, tissues, bilateral symmetry, body cavity, enclosed body cavity, hollow nerve tube, and backbone.
Habitat
Fish live in freshwater and saltwater.
Anatomical/ Structural Features
Fish have a backbone. They breath with gills. They have a closed circulatory system and a two chambered heart. Most have paired gills and fins. They are coelomate with endoskeleton. Most fishes have jaws. Most have scales.
How do they acquire nutrients
Fish are heterotrophs. Fish can be herbivores or carnivores.
What do they eat
Fish eat various organisms that live in the water.
What eats them
Predators of fish include other fish, mammals, and some aquatic crustaceans.
Symmetry
Fish have bilateral symmetry.
Mobility
Fish get around by swimming.
Reproduction
Fish reproduce sexually mostly by external fertilization but few reproduce by internal fertilization.
Development
Most fish go through these following stages in their life cycle: eggs, larval, fry, juvenile, adult, spawning.
Other Information
Fish have a swim bladder that allows them to control their depth. They can detect the slightest movement in the water because of their lateral line system.