Would you like to know more about the sea

creatures?

Of course we would!!!!

At this stage of work on the project „Around the sea” every student chose one sea animal, prepared a model of it and gathered as much information about it as possible. In exercising it, we learned a lot about these animals, their habits and way of life. We did it in order to broaden our knowledge about them. We learned many interesting facts, such as the fact that orcs hunt in a coordinated manner, usually in a group, dolphins are one of the smartest mammals living in water. While preparing the presentation we got to know each other better and learned to work in team. In addition to many interesting facts on creatures living in the marine environment, we got to know also a lot about the environment of their lives - the sea. The surfaces of the seas and oceans occupy 71% of the earth's surface and are still not understood by the totality of human living environment on our planet.

Dolphins

Dolphins are mammals water of the order Cetacea, suborder of toothed whales. The characteristic feature is an elongated snout. There are freshwater dolphins and the ocean. Often reside in clusters from a few to several hundred on a clearly marked hierarchy. Held long journey. Have the ability to echolocation. Dolphins can sleep in the water. Asleep,floating in the water at a depth of about 50 cm, with one eye open. Clawing breathing every 30 seconds. the surface is not waking up. Their main enemy is plowing. They live from 7 to 21 years. Inhabit the seas and oceans around the world, the largest inhabited warm water. Are also found in the warm river basins.

They eat: fish, cephalopods, crustaceans, and worms.

Małgorzata Samolej

Common Jellyfish

• Latin – Aurelia Aurita • Español – medusa común• Polski – chełbia modra• Türkçe – Ay denizanası Aurelia aurita (moon jelly, moon jellyfish, common jellyfish, saucer

jelly) The moon jellyfish is usually blue but sometimes different is one of a

group of more than ten morphologically nearly identical jellyfish species in the genus Aurelia. In general, it is nearly impossible to identify Aurelia medusae without genetic sampling, so most of what follows about Aurelia aurita, could equally be applied to any species of the genus. The medusa is translucent, usually about 5 – 40cm in diameter, and can be recognized by its four horseshoe-shaped gonads that are easily seen through the top of the bell. It feeds by collecting medusae, plankton and mollusks with its mucusy bell nematocyst-laden tentacles and bringing the prey into its body for digestion, but is capable of only limited motion; like other jellies it primarily drifts with the current even when it is swimming.

Julia Chrząstowska

Crabs

Crabs are the largest group ten feet, in which the first pair of legs transformed into a claw. their body size is highly variable, with a span of legs from a few millimeters to almost four meters

Are extremely agile - they can move forwards, backwards and sideways. Crabs inhabit all types of marine environments and freshwater and terrestrial environment.

They may be scavengers and herbivores. Their victims often are large invertebrates.

Crabs in Poland:In the Baltic Sea are found three species of crabs:- krab brzegowy - krab wełnistoszczypcy ( from China) - krabik amerykański ( from North America)

Weronika Mazur

Grey Seal

The Grey Seal is found on both shores of the North Atlantic Ocean. It is a large seal of the family Phocidae or "true seals". It is the only species classified in the genus Halichoerus. Its name is spelled Gray Seal in the US; it is also known as Atlantic Grey Seal and the Horsehead Seal.

It is a medium sized seal, with the bulls reaching 2.5–3.3 m long and weighing up to 300 kg; the cows are much smaller, typically 1.6–2.0 m long and 100–150 kg weight. It is distinguished from the Common Seal by its straight head profile with nostrils that are well apart, and fewer spots on its body. Bull Greys have larger noses and a more convex profile than Common Seal bulls. Males are often darker than females, with lighter patches and often scarring around the neck. Females are silver grey to brown with dark patches.

The pups are born in autumn (September to November) in the eastern Atlantic and in winter (January to February) in the west, with a dense, soft silky white fur; at first they are small and shrivelled-looking, but they rapidly fatten up to look like over-filled barrels, from the extremely fat-rich milk they receive from their mothers.

Justyna Kowalczyk

Atlantic Herring

Atlantic Herring is not a big fish. It lives in water of temperate zone, cool zone of North Atlantic, BaItic Sea and English Chanel. lives in big groups - shoals. It has flatend body, lenght about 30 cm, green - blue spine and belly and silver sides. Its sides line is unseen.It eats plankton, small crustacean and larvas of fish. During the day it hunts at the botton of the ocean or sea and during the night at the surface.It aachieves sexual mayurity at the age of 2 - 3 (baltic herring) and 5 - 8 (atlantic populations). Female lays about 10 000 - 100 000 eggs.Atlantic herring lives about 20 - 25 years.It is one of most important fish of seas fishery.It is very popular in cooking.

Magdalena Mordaka

The Harbour Porpoise

The Harbour Porpoise is one of six species of porpoise. It is one of the smallest marine mammals. As its name implies, it stays close to coastal areas or river estuaries and as such is the most familiar porpoise to whale watchers.In the Atlantic, harbour porpoises may be present in a concave band of water running from the coast of western Africa round to the coasts of Spain, France, the United Kingdom, Isle of Man, Ireland, Scandinavia, Iceland, Greenland, Nova Scotia and Newfoundland and the eastern seaboard of the United States.

Marta Brzozowska

Sea Turtle

• Maximum lenth: 150 cm. • Maximum weight: 500 kg.• Maximum age: 150 years. • Sea turtles eat worms , seaweed, crabs, shrimp,

snails and fish. Because they don’t have any teeth, they use powerful, pitted jaws to tear and cut into pieces food. Turtles spend all life in the sea, inly females for short time go on the land to lay eggs. Female consists of about 50-150 eggs. Turtles can be under water even 3 hours. That animals can dive even below 1000m. Turtles a larger part of their life spend single. They are under international protection.

Wiktoria Marszałek

Atlantic Salmon

Salmon grows to 150cm lenght and 46kg. It occurs in Atlantic, North Americas rivers and in Europe. It’s predator. Salmon nurture itself by small fishes and crustaceans.

Scientific classification Kingdom:Animalia Phylum:Chordata Class:Actinopterygii Order:Salmoniformes Family:Salmonida Genus:Salmo Species:S. salar Most Atlantic salmon follow an anadromus fish migration pattern, in that

they undergo their greatest feeding and growth in salt water, however adults return to spawn in native freshwater streams where the eggs hatch and juveniles grow through several distinct stages.

Dangers -Dams -Water pollutions -Poaching

Krzysztof Wójt

Common mussel

Blue mussel

Common mussel It`s a cosmopolitan clam, which occurs inter alia in Baltic, in shoals, in coastal areas. To 15 cm long, it has strongly reduced leg. It`s a nutriment for flounders, cods, flat-fishes, sturgeons, crabs and starfishes. Mussels are really important, they alter sea suspension to a high-quality protein, which is avail by people and animals. One shoal alter hundreds cubic metres water a day. In a Baltic mussel occurs in a dwarfed figure, to 5 cm long, but it poses 73,5% of sea fauna. Common mussel is the only representative its cluster in a Baltic.

The blue mussel is a mollusk occurring in the seas around the world. Depending on what area it residents, it reaches different sizes. For example baltic mussels are about 3 - 5 cm and atlantic species can grow up to 15 cm in length. The shell’s colour is usually dark brown, black or dark purple. The shell consists of two elongated half-round at one end, a second tapered, triangular in shape.Mussels live in large clusters that sometimes reach up to 30 thousand individuals per 1 m2. Blue mussel can be found at the shallows, clung to stones, rocks, piles and underwater structures. To attach themselves to the ground mollusks use "byssus". It is a substance setting in water, secreted by a gland found on the leg’s base.

Agnieszka Więcławska

Kornelia Blewązka

The Common Starfish

Starfish

Starfish are the animals with radial symmetry, like a star. They live at the bottom of the seas and oceans, under rocks and coral reefs at depths ranging from 0.5 to 300 m. Some species live in deeper areas of the sea.They usually have five arms but there are also those whose number reaches up to 50.If a starfish loses one of the arms after a while it grows new ones. Starfish have gonads and stomach tabs in their arms.They are crawling slowly ( with an average speed of 5-15 cm per minute) looking for prey. They are sometimes difficult to see because they hide in the crevices and nooks of the rocks. They move along the seabed in any direction using feet.

The Common Starfish is the most common and familiar starfish in the north-east Atlantic. It also appears in Indian Ocean and sometimes in the west parts of the Baltic Sea. It lives at the bottom of seas and oceans. This starfish mainly eats mollusks as clams and oysters, snails and fish. It has five arms and it is about 10-30 cm across. There were known some starfish which were about 52 cm across. It is usually red or orange, but there are some yellow, white, blue purple or green ones. It exists four to five years. It is really slow and it has average speed about 5-15 cm/min. It’s got great and very interesting skill: regeneration.

Weronika Woźniak

Agata Dubiak

Mackerel

Mackerel is a common name applied to a number of different species of fish, mostly, but not exclusively, from the family Scombridae. They may be found in all tropical and temperate seas. Most live offshore in the oceanic environment but a few, like the Spanish mackerel(Scomberomorus maculatus), enter bays and can be caught near bridges and piers. Common features of mackerel are a slim, cylindrical shape (as opposed to the tunas which are deeper bodied) and numerous finlets on the dorsal and ventral sides behind the dorsal and anal fins. The scales are extremely small, if present. A female mackerel lays about one million eggs at a time.

Weronika Wasiak

Northern shrimp

Northern shrimp P. borealis lives at depths of 20–1,330 m (66–4,360 ft), usually on soft muddy bottoms, in waters with a temperature of 2–14 °C (36–57 °F). The distribution of the nominate subspecies P. b. borealis in the Atlantic ranges from New England, Canada's eastern seaboard (off Newfoundland and Labrador and eastern Baffin Island in Nunavut), southern and eastern Greenland, Iceland, Svalbard, Norway and the North Sea as far south as the English Channel. In the Pacific, P. b. eous is found from Japan, through the Sea of Okhotsk, across the Bering Strait, and as far south in North America as Washington state.In their 8 year lifespan,males can reach a length of 120 mm (4.7 in), while females can reach 165 mm (6.5 in) long.

The shrimp are hermaphroditic. They start out male, but after year or two, their testicles turn to ovaries and they complete their lives as females.Shrimp alkaline phosphatase (SAP), an enzyme used in molecular biology, is obtained from Pandalus borealis. The species' carapace is a source of chitosan, a versatile chemical used for such different applications as treating bleeding wounds, filtering wine or improving the soil in organic farming.

Dominika Ślifierska

Thanks for watching Presentation prepared by:Dominika Ślifierska from Salesian Secondary School in Poland