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. It is hard to study the development of the Chimaera due to the deep-water habitat in which they mostly reside. Chimaera reproduce by laying eggs; these eggs are covered in another egg layer and dropped onto the ocean floor. Their diet consists of prey such as crabs, clams, and echinoderms. The Chimaera may also eat other fish if need be.
⦁ Squid: Squid have some unique adaptations. Some can change color, some use bioluminescence to create light, and some shoot ink to cloud the water and lose predators, they also have many other adaptions like the shape body, there long and skinny making them fast
There are four main classes of coral reefs, as broken down by scientists. These are Atolls, Fringing Reefs, Barrier Reefs, and Patch reefs. Atolls are found in the form of rings, and are mostly found in the middle of the sea. They form when islands amid fringing reefs sink into the sea or the sea level rises around them. The fringing reefs continue to grow and eventually form circles with lagoons inside.
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.
These highly sensitive eyes can sense predators easily. The transparent head and tubular eyes help them detect any incident light inside the deep ocean. Barreleye fishes attain up to a maximum size of 6 inches and prefer to remain stationary within the water and feed on jellies. 10. Dumbo
Sharing various comparable traits and physical features, made it confusing for humans to organize them in the classification system. Octopuses and squids share many features but lead different lives. As marine species, both octopuses and squids have a suitable body for maintaining life at sea. Octopuses range in size from one centimeter to five meters, as squids are about sixty centimeters (giant squids can be thirteen meters). From the lack of bones, octopuses and squids are mostly soft.
The α-chitins were isolated from the exoskeletons of crabs, lobsters and shrimps, endoskeletons of mollusks, β- chitin from squids, and γ-chitin also found in cell wall of fungi and algae (Peniche, Arguelles-Monal, & Goycoolea, 2008; Kumar, 2000; Kurita, 2006). However, the fungal cell wall chitin is associated with other polysaccharides such as cellulose, glucan, mannan and polygalactosamine, when this isolation is difficult (Peniche, Arguelles-Monal, & Goycoolea, 2008). But crabs, lobsters, shrimps, mollusks and squids chitin is associated with
Internally fertilized eggs are deposited in gelatinous mass. The large, yolky egg of terrestrial snails are deposited in moist environments, such as leaf litter, and a calcareous shell may encapsulate them. In marine gastropods, spiral cleavage results in free swimming trochophore larva that develops into another free swimming larva with foot, eyes, tentacles, and shell called a veliger larva. Sometimes, the trocophore is suppressed, and the veliger is primary larva. Torsion occurs during the veliger stage, followed by settling and metamorphosis to the
(Ceph Behavior.) The octopus brain fascinates researchers indirectly by holding the responsibility for the complex behaviors observed. But looking simply at the biology of the octopus brain, we acquire foundational information to advance thought and studies. Most invertebrates have “ladders” of knots of neurons connected by nerve fibers. Vertebrates typically have one big clump of neurons – the brain.
ANATOMY OF THE SPINE The vertebral column in an adult is composed of 33 bony vertebrae divided into five regions: 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal. Significant flexibility is evidenced only at the level of the upper 25 vertebrae. In adult the 5 sacral vertebrae fuse together to form the sacrum, and later in adult life the 4 coccygeal vertebrae fuse together forming the coccyx. The lumbosacral angle is the angle formed at the junction of the long axes of the lumbar spinal vetebrae and the sacrum. The vertebrae gradually become larger going down to sacrum and then become progressively smaller toward the tip of the coccyx.
Some of the Cephalopods have the ability to shine in the dark. This is all caused by a pair of light organs ,which are located inside the mantle sac on the underside of the Cephalopod. It contains a sac full of luminous bacteria and a lens which consists of many reflecting plates needed to control the brightness of the bacteria. Using this organ ,squid can manipulate the light coming downward and use it to mask its own silhouette , protecting itself from
This can be used as a weapon but is also used to glide through the water. Sailfish get their names from the large sail like fins they carry on their back. These fins are usually taller than the body of the fish itself. They also have a second, smaller dorsal fin and two sharp rudder like fins on their bellies for sharp cutting turns in the water. The fins are usually a darker color to intimidate other predators.
To protect the Mako Shark species, they are protected by U.S. waters(Beardsley, 2015). Mako sharks are fascinating animals. They have long, slim bodies to enable them to swim at fast speeds. Makos live all around the world in central oceans. They have special adaptations they use to help them survive.
The chalk was formed due to calcium carbonate left behind by decomposed shells of microscopic algae that populated the Seaway. This layer of the Niobrara contains much evidence of life of vertebrates and aquatic life, including birds. The limestone layer is a thick layer of limestone separated from the chalk layer by shale. The limestone layer also contains many fossilized remains, but is best known for having marine reptiles that have been preserved rather well. The currents from the different seas as well as the draining of surface water into the seaway were important in the formations of these layers and the fossilization of marine life (Colorado Parks and
Chase Ward Mrs. Walser Bio 2 8-31-15 Meandrina Throughout the ocean are many different types of corals, but located along the foot of the Caribbean Sea and Gulf of Mexico lies the Meandrina. The Meandrina is a coral that can form spherical heads along with flat plates that extend for yards beneath the sea. Within the genus of Meandrina you have the meandrites. Meandrites are sometimes known as the “maze coral” this type of Meandrina is found on the slopes underneath the water in the common areas for this genus of coral. Most of the formations are hemispherical but sometimes cone shaped colonies form divided from the substrate or the rest of the Meandrite.