no usually just the tail , the other fins are for steering
Primitive fish are typically simpler in structure and behavior, with characteristics like cartilaginous skeletons and lack of jaws. In contrast, more advanced fish have evolved adaptations like bony skeletons, jaws, and specialized sensory organs for improved survival and reproduction. They also exhibit more complex behaviors and reproductive strategies compared to primitive fish.
the one behind
Agnatha means 'no jaws', and they really don't have jaws, although they do have teeth. They also have no stomach, and no boney skeleton. Their skeleton is cartilagineous, like the elasmobranchs.
a dorsal fin is the one (or more) located on the back of a fish or aquatic mammal - its the fin that you see when a shark is swimming just under the surface of the water. Ventral fins are the ones toward the rear of the body and help in steering the animal through the water
cartilage fish have paird fins and jaws and they have bones. jawless fish have no paired fins and jaws and they have no bone Cartilage fish = sharks and rays Jawless fish = hagfish and lampre
no usually just the tail , the other fins are for steering
You seem to be getting things a bit mixed up. Yes "Lobe fins" are paddle like fins. The more primitive (prehistoric) fish like the Coelocanth and the Australian Lung Fish have pectoral fins described as "lobed fins". However these have absolutely nothing to do with "milt". Milt is the name given to the substance spread by male fish to fertilise the females ova (eggs). It is the equivalent of sperm in mammals.
Male betta's are larger, more colorful, and have much longer fins. Female betta's are small, less colorful, and have short stubby fins.
They wiggle their fins and go forwards? It's not rocket science. More... aquadynamics?
Bony fish typically have a greater number of fins than sharks, including paired pectoral and pelvic fins, a dorsal fin, and an anal fin, which are often more flexible and can be variously shaped. In contrast, sharks possess fewer fins, primarily including a larger dorsal fin, paired pectoral fins, and a caudal fin, which are more rigid and often triangular or crescent-shaped. The fins of bony fish are generally supported by bony rays, while shark fins are made of cartilage. This structural difference contributes to the varying swimming techniques and adaptations of each group.
The clownfish have more rounded fins than other anemone fish and this makes it a slower swimmer. But, these fins enable the fish to make quick darting movements. Clownfish are immune to the anemone sting, because of a mucus they have. This gives them a place to hide from predators.
Puffer fish will eat fins before anything. lol. they like bloodworm and more carnivorous foods.
Probably because fish are more advanced biologically.
The most primitive fish are typically represented by the jawless fish known as agnathans, which include species like lampreys and hagfish. These fish have a simple body structure and lack jaws, fins, and paired appendages, differentiating them from more advanced fish. They are considered some of the earliest vertebrates, having existed for hundreds of millions of years, providing insights into the evolution of more complex fish and vertebrates. Their unique characteristics make them a significant focus in studies of vertebrate evolution.
Although I'm not sure what you mean by "deep" body, Betta fish, or Siamese Fighting Fish, or Rumble Fish (if you're S.E. Hinton) are thin, brightly-colored (domestically bred males tend to be more colorful), and have long, wavy fins.
Yes.