Hammerheads have wide-set eyes on the outer edges of the hammer adapted to give a wider and better visual range compared to other sharks. The eyes can rotate for a 360 degrees vision and one eye can see below while the other sees up simultaneously, however, the positioning of the eyes create a blind spot in front of the nose. The nostrils are expanded further enhancing their ability to follow scent and locate prey. Other features include two extra tall dorsal fins of different sizes. Most hammerheads have a lifespan of between 25 and 35 years though observations are currently indicating that more and more of this shark family live longer than 35
Preparation for the Dissection The Dogfish shark is about 70 inches long and you should notice along the side of the shark there is a light colored horizontal stripe called the lateral line. Made up of a tiny pore that lead to receptors that are very sensitive to the mechanical displacement of water and sudden changes of pressure. You will need tools for this including Latex gloves, yard stick (with centimeters), scalper knife, scissors, probe, and if you have a weak stomach you should wear facemask so the smell won’t be bad. External Anatomy Let’s start with the pectoral fins which are toward the front and side of the Dogfish Shark. The Dogfish has two dorsal fins, you have a anterior or first dorsal fin and a posterior or a second dorsal fin both have spines so look they looked closely and are available to locate them.
In addition, wide-set eyes give The Great Hammerhead shark a greater, more enhanced range of sight. Its coloration varies from brown to light gray on the dorsal side and a white underside. The sharks have curved pelvic fins and an asymmetrical caudal fin for smooth, quick swimming. The distinguishing characteristics
They have long thick bodies with a rather thin tail. Like sharks the Chimaera has cartilage instead of bones. When swimming, they flap their large pectoral fin as if they were wings which in turn propels them through the water. Chimaera have four gills covered by an operculum on each side of its head. The fertilization is internal due to the male chimaera’s pelvic fins or claspers that they use to grab and hold onto the female chimaera during copulation.
Also known as the golden kingfish, banded trevally and king trevally, the Golden Trevally has a unique colouration, which ranges from bright yellow with black bars as a juvenile and a golden/silver colour as an adult, It is known to grow to 120 cm in length and 15 kg in weight. They tend to create schools and follow larger animals such as Jelly fish and sharks, but can also be found living in solitude. Because of their fast reflexes and manoeuvrability they can avoid being attacked by the larger species they would follow, and this also allows them to get protection from other predators and the large host would attack the predator. The species’ mouth is one of its features that define it from other fish as the mouth is highly protractile and
The Hawaiian monk seal, or Monachus schauinslandi, was one of the original species to be placed under the Endangered Species Act that was enacted in 1973. As of 2010, the population of the monk seal is approximately 1,100, with an annual decrease of approximately 4.5%. The Hawaiian monk seal is primarily found on the Northwestern Hawaiian Islands that are made up of coral reef atolls, seamounts, banks, and shoals. This is due to the fact that the monk seals primarily forage on the barrier reefs of the atolls, on submerged reefs, and on banks further from the atolls (Curtice et al, 2011). The monk seals primarily like to look for food on the surface of the ocean floor and will search for food in depths up to 500 meters.
Your response: I learned that certain unusual animals can reproduce on their own. If a zebra shark can reproduce without a male then other animals can do the same. Sharks laying eggs without a male isn’t unusual. Leonie was with a male shark at first before she started reproducing on her own. Zebra sharks can lay several eggs throughout their lives even if the male is present.
These expressive eyes are the main reason why these dogs are one of the much-loved dogs. This dog possesses medium to large sized doggy eyes. The colors of the eyes are of different hues of brown and ranges from light brown colors to much darker and denser hues of brown. It also has beautiful ears that are smaller when these dogs are young. Younger golden Retrievers also have darker shades of color at the tips of their ears.
They will sometimes travel hundreds of miles to lay their eggs on the same beach where they were hatched. Green Sea Turtles mate every two to four years, and they can mate up to three to five times per season. When the females are ready to lay their eggs they climb onto shore where they dig a pit to lay their eggs. After they have laid their eggs they cover them up with sand and then go back into the ocean. Females lay anywhere from 100 to 200 eggs.