The dorsal fin is triangular, and has been know to grow in excess of 6 feet in length on males, but grow no more than 3 feet on females. (Martin) The pectoral fins of the orca can measure up to one sixth of it’s body length and is in the shape of a paddle. The orca usually have 40-50 conical teeth which measure over 2 inches in length, and has a perfect fit with the opposite set which makes it an excellent hunter. Although the teeth are robust, they do a lot of work through the years because older orcas have been known to have teeth worn down to the gum tissue (Haley.) The tongue of a killer whale has been known to weigh in excess of 2 tons (Martin.) They have been known to be fearless hunter, and a fast predator. Some say the ferocity of the killer whale exceeds that of the great white shark, which makes it one of the most feared in ocean life.
Instead of keeping the dolphins in the nets that they catch the other fish with, they are required to release the dolphins from the net as soon as possible(NOAA 5). This is done carefully so that “the dolphins are released alive(NOAA 6).” This allows more dolphins, despite still being bycatch, to live through the process and carry on with their lives. They also catch tuna in ways other than following dolphins, such as using logs or tuna caught on a trip in which no dolphins are harmed(NOAA 12). This type of tuna fishing allows fishing industries to put the Dolphin-Safe label on their tuna(NOAA 11). Fishing industries have already taken the necessary actions to stop cetacean bycatch as much as they can. How much they have changed their gear and their methods in order to compensate for the cetaceans supports that cetacean bycatch is no longer an
In addition to this nature, they are capable of advanced communication skills that allow them to teach new tactics they have learned to their fellow dolphins. I am also the same as a Bottlenose Dolphin when it comes to efficient communication skills.. My style of learning requires me to go through an exhaustive process of trial and error until I have efficiently learned what I have desired to learn. With the knowledge that I have gained, I have been able to ascend to higher levels of academic studies with the ability to use my acquired thinking and comprehension skills which help to aid me in everyday life. However, I am not one to hoard any information that I have managed to learn. I will share any knowledge that I know with my fellow peers around me so that I may aid them throughout life just like a Bottlenose
Despite having “whale in its name, the false killer whale is actually a large dolphin like its namesake “the killer whale”. The difference between a “whale” and a “dolphin” is much like the difference between a “ship” and a “boat”. It has more to do with size than science. In fact, false killer whales are large dolphins.
Dolphins live in packs also known as pods. All dolphins don't live in the same pod forever they might move from pod to pod. That's why there are smart because they ned brain capacity to move from pod to pod and not break chemistry. Most pods don't care for the leader beside the bottlenose dolphins. regardless most species pods do not have any membership. a lot of pods are separated from male to female. Male pods can live with the same members ranging from 10 to 25 years. Male pods cooperate during mating season so each dolphin gets a specific female. Most male pods compete and team up to defend themselves. There are three different types of pods, nursery, juveniles, and males. Nursey pods are full of females and their calfs. Juvenile pods
Their head has a very narrow shape, even at the top of the melon. They also have 3 colors on their body, the skin on the dorsal area has a grey color down to the sides where it has a sharp change in color to a lighter grey. The lower part of the body is so white it looks pinkish. They measure between 1.29 and 2.35 meters in length and its weight range is between 23 and 79 kilograms. The name “Spinner” comes from their above water actions. They can leap into the air and make as many seven complete spins before diving back into the ocean. The power of the spin comes from the huge acceleration under the water and the torque of the tail just as the dolphin breaks the surface. Female spinner dolphins reach sexual maturity about 4-7 years, males about 7-10 years. Calves are nursed for 1-2 years. They approximately weigh around 130 to 170 lbs. Spinner dolphin inhabits most tropical waters of the world, and can also occur in sub tropical and warm temperate waters. They are very energetic in the ocean and out of the ocean. Head slaps acoustical messages that often are intended to get the attention of other dolphins. Head slaps in some cases are used to indicate to the pod the direction of travel desired by the slapper.
Dolphins have been around a lot longer than humans. They originated about 50 million years ago. The most common dolphin, being the bottlenose dolphin, has been around for 15 million years. Surprisingly, dolphins originated from members of the cetaceans group. Cetaceans used to be land mammals but evolved into being aquatic mammals. In From Land to Water it stated, “The transition from land to water is documented by a series of intermediate fossils from India and Pakistan.” This research helps prove how they used to be land mammals but evolved to live in the ocean. Dolphins are one out of many aquatic mammals who need oxygen, but they need water in order to live. Believe it or not, dolphins are somewhat related to hippos, camels, deer, cattle, and giraffes. In From Land to Water, “ Many features that are
Killer whales are a type of dolphin, but much bigger and faster. Killer whales have been nicknamed wolves of the sea because of their close knit social groups and cooperative hunting behavior.
Dolphins also have the intelligence to save and help humans when they are in danger. About 65 million years ago the ancestor of a dolphin was called a Mesonyx it was a mammal that had lived on land and would feed from the water. Over time, as the habitat and climate was changing they started to get closer to the water. They started to lose their limbs and hair because of the cold water. Todays dolphins still have the structure of pectoral fins is a remnant life on
Amazon River dolphins weigh two hundred twenty pounds to three hundred fifty pounds (Carruthers). Males grow up to eight feet and females are not that much smaller, growing up to about seven and a half feet long. Amazon River dolphins have a unique body structure. These dolphins have flexible necks which allow them to move their head left to right and they have a very well-defined crease along their back (Amazon River Dolphin).
There is something about dolphins that fascinates me. They are some of the most intelligent and beautiful animals that I have ever seen. Their faces are so cute that every time I look at a dolphin it looks like it is smiling at me and wants to tell me something. The noises they make represent some kind of language and it makes me wonder if they can really communicate. I also want to know what kind of feeling they have and whether they have emotions. This is why I chose to do this I-search project on dolphins; the different kinds of dolphins there are, the places that they can be found and their mental abilities.
Bottlenose dolphins are one of thirty-two species of marine dolphins (World Book 297). Their scientific name is Tursiops Truncatus. Males are usually longer and heavier than females. Bottlenose dolphins can grow to be thirteen feet long and weigh up to 600 pounds (Bottlenose Dolphins). This makes bottlenose dolphins the largest of the beaked