General Features:
* Streamlined shape: This helps them move efficiently through water.
* Scales: Most fish have scales, which provide protection and help with movement.
* Fins: These are used for movement, balance, and maneuvering.
* Gills: These are specialized organs that extract oxygen from the water.
* Lateral line: A sensory organ that detects vibrations and pressure changes in the water.
Specific Features:
* Mouth: The shape and position of the mouth can vary depending on the fish's diet.
* Teeth: Teeth are used to capture and process food, and can vary greatly in size and shape.
* Eyes: Fish have excellent vision, particularly for detecting movement.
* Coloration: Fish use coloration for camouflage, signaling, and attracting mates.
* Body Shape: Fish have many body shapes, each adapted to their environment and lifestyle. For example, flatfish lie on the seabed, while tuna are streamlined for speed.
Examples of noticeable features:
* Shark: Cartilaginous skeleton, sharp teeth, dorsal fin, gills on the sides of the head
* Clownfish: Striking orange and white coloration, live in anemones
* Anglerfish: Luminous lure used to attract prey, large mouth
* Seahorse: Horse-like head, prehensile tail, vertical posture
* Goldfish: Single dorsal fin, large scales, varied colors
Important Note: There is incredible diversity among fish species, so these are just some general examples. You can find a wide range of noticeable features depending on the specific fish you are looking at.