Hey guys it's Kerry it's shark week
I'm showing lots of my sharks and also crustaceans
crustaceans include crabs lobsters and shrimp
sharks have a skeleton made of cartilage with five to seven gill slits on the
side of the head and pectoral fins that are not fused to the head
a lot of sharks are apex predators goblin shark they are bentho pelagic
creatures their soft
semi-translucent skin has a rough texture from a covering of dermal
denticles each shaped like a short upright spine
and lengthwise ridges clawed lobster
they are ten legged creatures just like shrimps and crabs
clawed lobsters have claws and inhabit cold waters
the lobster molts its shell each year to grow a new larger one
the shell cannot expand in size as the lobster grows
lobsters without shells are easy prey and they usually hide until a new shell
grows
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spiny lobster they have long antennas instead of claws
and they will be found in tropical warmer waters
blue crab to defend themselves they use their
sharp front pincers crabs have eyes on stalks just like
snails
king crab they are a taxon of decapod crustaceans
chiefly found in cold seas
dungeness crab they have a wide long hard shell which
they must periodically molt to grow
hermit crab as they continue to grow they need to
find larger shells to live in they are omnivores
and eat pretty much anything they can find in the surrounding water
they are mainly found in coastal waters where there is more food and places to
hide
mako shark they are the fastest shark and one of
the fastest fish on the planet with top speeds of 75 kilometers per hour
it is able to leap out of the water when hunting
blue shark is another one of the fastest fish with its sleek tapered body that is
made for fast swimming and quick turns the tail fin moves from side to side
propelling the shark along it will pursue its prey for long
distances
thresher shark they are known for slaying their prey with their huge tails
and are famous for special jumping techniques and behaviour
tiger shark females mate once every three years
they breed by internal fertilization the male inserts one of his claspers
which is like a penis into the female's genital opening called a cloaca
acting as a guide for the sperm the male uses his teeth to hold the
females still during the procedure often causing the female considerable
discomfort the tiger shark is the only species in
its family that is ovoviviparous its eggs hatch internally and the young are
born live when fully developed the vertical stripes are found mainly on
younger sharks and fade as they mature their powerful jaws have sharp highly
serrated teeth that can even crack the shells off sea turtles and clams
they can grow up to seven and a half meters and are found in tropical and
subtropical waters throughout the world
the whale shark is the largest fish in the sea
about 12 meters long it is a filter feeder
it feeds near the surface by filtering water through its massive jaws its
favorite food is plankton
the whale shark's flattened head has a blunt snout above its mouth with the
short barbells protruding from the nostrils
megamouth shark is the smallest of the three extant
filter feeding sharks alongside the whale shark and basking shark
basking shark it is the second largest living shark
and fish after the whale shark and is also a filter feeder
it has a greatly enlarged mouth and highly developed gill rakers
its snout is conical
hammerhead shark it is a very unusual looking shark they
use their wide set eyes to give them a better field of vision
they use their cephalofoil for sensory reception maneuvering and prey
manipulation the cephalofoil gives the shark superior
binocular vision and depth perception the cephalofoil helps them even find
stingrays buried in the sand the mouth is located on the underside of
the head it has sharp triangular and serrated
teeth the largest hammerhead can grow up to
six meters
sally light foot crab they feed on algae plant matter and dead
animals it is a quick moving and agile crab and
hard to catch sand tiger shark they hunt by stealth
it is the only shark known to gulp air and store it in the stomach
allowing the shark to maintain near neutral buoyancy
bull shark they can thrive in both salt and fresh water and can travel far up
rivers their name comes from the shark's stocky
shape broad flat snout and aggressive
unpredictable behaviour they are diadromous
meaning they can swim between salt and fresh water with ease
the bull shark is one of the few cartilaginous fishes that have been
reported in fresh water systems bull sharks in fresh water possess
several organs with which to maintain appropriate salt and water balance
these are the rectal gland kidneys liver and gills
all elasmobranchs have a rectal gland which functions in the excretion of
excess salts accumulated as a consequence of living in sea water
therefore bull sharks in fresh water environments decrease the salt excretory
activity of the rectal gland to conserve sodium and chloride
their diet consists mainly of bony fish and small sharks including other bull
sharks and stingrays
shrimp or prawn they have narrow muscular tails
long whiskers or antennae and slender legs
megaloden it probably had a major impact on the
structure of marine communities the fossil record indicates that it had
a cosmopolitan distribution it targeted large prey such as whales
seals and sea turtles juveniles inhabited warm coastal waters
and fed on fish and small whales unlike the great white which attacks
prey from the soft underside megalodon probably used its strong jaws
to break through the chest cavity and puncture the heart and lungs of its prey
it would have faced competition from whale eating cetaceans such as livyatan
and other macroraptorial sperm whales and possibly smaller ancestral killer
whales as the shark preferred warmer waters it
is thought that oceanic cooling associated with the onset of the ice
ages coupled with a lowering of sea levels
prey being less abundant may have contributed to its decline
the shark's extinction coincides with a gigantism trend in
baleen wales
great white shark it is an apex predator and it has no
natural predators other than on the very rare occasions
the orca it is the world's largest known extant
macro-predatory fish and is one of the primary predators of marine mammals
up to the size of a large baleen whale this shark is also known to prey upon a
variety of other marine animals including fish and sea birds
great whites live in almost all coastal and offshore
temperate waters
it is an epipelagic fish observed mostly in the presence of rich
game such as fur seals sea lions cetaceans
other sharks and large bony fish species
although considered a coastal shark it has been recorded at depths as great as
1 200 meters Please stay
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