In the late 1990s, a species was introduced into the waters of the Atlantic Ocean, becoming an invasive species: the lionfish. The lionfish, a venomous marine fish found mostly in the Indo-Pacific waters, is distinguished by its red, white, and black stripes, striking pectoral fins and its venomous spiky fin rays. The lionfish ranges in its size from 6.2 to 42.2 cm, with an average adult measuring the size of 38cm and weighing 480 grams, living 5-15 years. This venomous species is well known for its beautiful venomous spines and unique tentacles. Younger lionfish have a unique tentacle above their eye sockets, which differs in appearance between species, but studies show that this tentacle has evolved over time in each species serving to attract new prey.
• The common garter snake feed on worms, fish, insects, amphibians, and uncommonly mice. • Aquatic Birds: Other than ducks and geese, over 20 species of aquatic birds can be found in the Rideau River. Many aquatic birds use the river as a “migratory staging area”. Ducks in the area eat similar to the common snapping turtle including plants, insects, and small amphibians. • Fish: The Rideau River has a variety of cool-water fish.
Killer Whales are marine animals that live in oceans all over the world. Although they live in many oceans, they seem to prefer coastal waters and cooler regions. The Killer Whale, sometimes called an Orca, sometimes enters estuaries, but doesn’t go far from the sea. Killer whales are one of the top predators in the sea. They are good hunters that eat a large variety of fish, squid, sharks, marine mammals (such as whales and seals), turtles, octopi, and birds (penguins and gulls).
The pots were about 3 feet 6 inches and contained two to three dozen good size crayfish weighing about two several pounds. The men said it was about one hundred and fifteen to three hundred feet long. Another eyewitness saw a great white shark the size of a tractor trailer had attacked a person. Many sharks have been clocked out as fast as 1.5 miles and the mega shark could probably swim in a longer distance since this is a bigger shark. Two percent of the ocean has been overlooked by people ant it leaves ninety-eight percent of the ocean for the megladon can swim.
They have no natural enemies except man and power boats which are responsible for most manatee deaths- (in 1990, 218 manatees or 12 % of the total population were killed by boats), though the red tide (toxins released from the bloom of dinoflagellates) of 1982 and1996 killed over 15% of the population. It is suspected that environmental pollutions create disease vulnerability in marine mammals with manatees being no exception. An example is when 10,000 seals died in 1988 in Denmark and Sweden from viruses related to canine distemper. High concentrations of PCB’s were detected in necropsies of these seals, presumably from the water and fish they ate. Other threats include accidental
Habitat loss, and other smaller factors, are driving this remarkable specimen extinct. This fish plays a fairly important role in a Coral Reef ecosystem. It, to put the task in simple terms, converts coral to sand, providing a home for countless crustaceans, microorganisms, and predators. Very few species of fish exhibit this behavior and, thus, makes the Rainbow Parrotfish a vital asset for this ecosystem. The juvenile Rainbow Parrotfish generally spends its time in "mangrove sanctuaries", areas where the roots of a mangrove tree grow into the ocean and serve as a safe haven for small fish.
SO what the killer whale does it dives in the water and become submerged in the water for more than 15 minutes so they can use echolocation and listen where their prey is 3. Another selective pressure is the pressure that increases as they dive. Unlike human scuba divers, a whale doesn’t breathe air under pressure. It inhales only at the surface. Furthermore, in diving mammals, the alveoli collapse at about 3 atmospheres of pressure (about 90 feet), forcing air into the bronchioles (rigid air passages), a region where gases are not exchanged.
The movement of the ears closer to the eyes is also part of the evolution process. After millions of years the nostrils slowly migrated from its nose to the top of the head which makes it easier to breath when swimming under water (also known as a nasal drift). Those nostrils later evolved into blowholes so that they can get to the surface of the water, take in air, and then go underwater again with ease. Also the bones of a dolphin are relatively lighter than land mammals because dolphins don’t have to carry the weight of those land animals. The head of Dolphins have changed over the years as well; it has grown larger which shows that the lower jaw emerged.
These little fellows are found higher in the intertidal area. Watch for them in tide pools, under rocks, and under clumps of seaweed. They're very common here. Lower in the intertidal, you'll see the granular hermit crab (Pagurus granosimanus). It has red or orange antennae, lacks hair, and its claws seem rough or grainy.
It feeds on ectoparasites or dead tissue that it picks from the body and oral cavities/gills of these fish (e.g. ; Tangs or Groupers) in the wild or in the aquarium. This also helps to protect the fish from contracting diseases and infections. Many fish value its services so highly that they will allow it to clean the inside of their mouths, and not harm it. Some fish, though, such as Hawkfish, Lionfish, and some predatory shrimp and crabs may eat the Scarlet Skunk Cleaner Shrimp.