Channel catfish, which look like the blue catfish, have rounded anal fins with at least 24-29 rays, forked tails, and black spots that trail along their sides and back. Their bellies are white and their backs are light blue to silvery gray. However, some channels when they get larger lost their black spots and take on a blue-black color. Males especially tend to do thiswhen they are spawning.
The term ‘algae’ is used for some lower plants and many, often unrelated groups of microorganisms that are able to perform photosynthesis in the water. Photosynthesis, the proccess of converting light energy into chemical energy, is performed in parts of the cell called chloroplasts. They can be found in different shapes and colours and in many different organisms. Not all these organisms are green.
Jellyfish are marine animal invertebrates that belong to the Scyphozoan class, and in turn the phylum. The body of an adult jellyfish is composed of a bell-shaped, jelly producing substance enclosing its internal structure, from which the creature’s tentacles are suspended. Each tentacle is covered with stinging cells that can sting or kill other animals: most jellyfish use them to secure prey or as a defense mechanism.