Introduction: Pisces are the animals which are included under phylum chordata. Their group is vertebrata. They have got jaws.So, they are also categorised under gnathostomata.
General characters of pisces: Pisces exhibit the following characters:
-They aquatic in habitat. They live in any type of aquatic habitat like sea, lakes, ponds ditches rivers etc.
- They have stream - lined body shape which helps them to reduce water resistance during swimming mode of life.
-Locomotary organs are the fins which help in swimming. There are different types of fins in the body of fishes. Foe example, the dorsal fin, ventral fin, caudal fin, pectoral fin and pelvic fin.Among the different types of fins, the dorsal, ventral and the caudal fins are unpaired and called the median fins where as the pectoral and pelvic fins are the paired fins. Fins are supported with finrays.
- Fishes respire through the gills. So, the respiratory organs are the gills which take in oxygen whch is dissolved in water. They give out carbondoxde.
- Their body is covered wth scales. Scales may be spiny or smooth and slippery. Some fishes have the spiny scales and some have the smooth and slippery scales.Anyway, Scales are the organs which protect the body of fishes from externsl injury and also help to hes escape from the enemies.
- Some fishes have the air-filled sac like structures called air bladder. Air bladder helps them to live and adjust their body in the different depths of water accordng to their need.
General characters of pisces: Pisces exhibit the following characters:
-They aquatic in habitat. They live in any type of aquatic habitat like sea, lakes, ponds ditches rivers etc.
- They have stream - lined body shape which helps them to reduce water resistance during swimming mode of life.
-Locomotary organs are the fins which help in swimming. There are different types of fins in the body of fishes. Foe example, the dorsal fin, ventral fin, caudal fin, pectoral fin and pelvic fin.Among the different types of fins, the dorsal, ventral and the caudal fins are unpaired and called the median fins where as the pectoral and pelvic fins are the paired fins. Fins are supported with finrays.
- Fishes respire through the gills. So, the respiratory organs are the gills which take in oxygen whch is dissolved in water. They give out carbondoxde.
- Their body is covered wth scales. Scales may be spiny or smooth and slippery. Some fishes have the spiny scales and some have the smooth and slippery scales.Anyway, Scales are the organs which protect the body of fishes from externsl injury and also help to hes escape from the enemies.
- Some fishes have the air-filled sac like structures called air bladder. Air bladder helps them to live and adjust their body in the different depths of water accordng to their need.
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