What does the fish mean as a symbol?
The fish symbol has its origins in early Christianity. Christians believe that Jesus Christ, the Son of God, died on the cross for mankind and rose again. In order to be able to recognize each other as Christians, Christians came up with a symbol: the fish.
What do fish have to do with communion?
So the I stands for Jesus, CH for Christ T, Y, S mean God’s Son, the Savior. To find out if someone was a Christian, they drew the upper side of the fish in the sand. So even today the fish is used in connection with communion to show that a Christian is celebrating here.
What are the typical characteristics of fish?
Typical features of fish. Gill breathing, fins for locomotion and scales as protective armor are characteristic features of the group of fish.
What is the body cover of fish?
The skin is usually covered with scales. Fish have different types of fins. There are the dorsal and anal fins, the pectoral and pelvic fins, the caudal fin, and some fish also have an adipose fin. The dorsal and anal fins are there for balance.
What is the protective body covering of the fish called?
The fish’s body is covered by a thin, slimy layer of skin. This allows the fish to glide easily in the water. The fish skin consists of the epidermis, dermis and hypodermis. In many fish, the dermis contains scales arranged like imbricated tiles.
What does the streamlined body mean in fish?
Fish are excellently adapted to life in the water: the body is streamlined. This means that it offers little resistance to the surrounding water, so the water can flow easily along it.
What is meant by streamline shape?
Streamline shape, a special shape of bodies in flow, which is characterized by an extremely low drag coefficient. The streamlined shape is characterized by a rounded head and a long, pointed end (so-called
What is the function of the tail fin in a fish?
Along with the caudal peduncle, the caudal fin is the main propulsion organ in many fish. Fish generally generate propulsion by pushing their bodies forwards through the water with powerful, sideways strokes. The body of the fish performs strong, wave-like movements along its axis.
What is a streamlined body?
streamlined. meanings:  Technology: Having a shape that creates only a low flow resistance to a medium flowing around it.
Which animals have a streamlined body?
Nature also shows a special streamlined shape in some animals. Fish, whales and penguins in particular are particularly streamlined. Birds are particularly well adapted to the rules of aerodynamics.
What is the function of the pelvic fin?
ventral fins, pinnae ventrales, the paired fins between the pectoral fin and anal fin (sometimes also in front of the pectoral fins) on the ventral side of most fish; are primarily used for stabilization and steering.
What is the job of the dorsal fin?
The function of the dorsal fin corresponds to that of a keel, i.e. it stabilizes the vertical position of the fish in the water. It can be divided into several parts (e.g. perch) or a whole series of small sections (e.g. rafters).
What is the function of the anal fin?
anal fin, an unpaired fin (fins) on the ventral side behind the anal opening in most fish; is mainly used for stabilization when swimming. Fish (color plate), skeleton (color plate).
What is Throat Stable?
Belly fins that are in front of the pectoral fins are called pharyngeal. The pelvic fins are ~[⇑] and the caudal fin strongly rounded. The burbot has a very beautiful marbling pattern running all over its body.
What is the fin hem?
One speaks of an F. when the anal, caudal and dorsal fins of a fish have grown together in such a way that they evenly line the back and belly of the fish body.
Which fins are used to propel the fish?
The most important means of locomotion for fish are the fins. Fins consist of cartilaginous or bony fin rays covered by skin. As a rule, a fish has paired pectoral and pelvic fins, an anal fin, a caudal fin and a dorsal fin.
Which fins does the fish move when hovering in place?
The swim bladder is an organ of bony fish. It is used by the fish to adjust its specific gravity to that of the surrounding water so that it can float in the water.
Which fins does the fish primarily move when hovering in place?
The caudal fin provides the drive, the pectoral fins stabilize in changes of direction and the fish can also use them to brake. The dorsal fin, pelvic fin and anal fin stabilize the fish while swimming. But he mainly swims up and down with his swim bladder. Mostly he moves the caudal fin.
Which fish have an adipose fin?
The adipose fin occurs in 8 known orders of bony fish; among them are the salmonids (salmon-like) as well as the catfish-like or the smelt-like and their shape, in contrast to their structure, can vary significantly.
Which fish have crested scales?
We find crested scales in our perch-like fish such as perch, ruff or zander. The crested scales are small, lie firmly in the skin and show their tiny teeth. The rear side of the scales protruding from the subcutaneous tissue is serrated. That is why the fish are rough to the touch.
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