The Common Carp or European Carp (Cyprinus carpio) is a widespread freshwater fish in lakes and rivers, native to Europe and Asia. It has been introduced to many other countries and is regarded as an invasive species.
The Common Carp has bronze or yellowish scales with serrated dorsal and anal fin spines.
Common Carp can grow to very large sizes with adequate space and nutrients. However, the average size of the Common Carp is around 40–80 centimetres (16-32 inches) long.
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The Yellow Tang (Zebrasoma flavescens) is a bright yellow peaceful saltwater fish in the Acanthuridae family, native to the Hawaiian Islands. Flavescens means yellow. They are related to the surgeon fish.
They are round and flat, with dark eyes and a protruding nose. At night, the yellow colour fades slightly, and a prominent brownish patch develops in the middle with a horizontal white band. During daylight, the yellow colour returns.
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The Dalmatian Linckia (Linckia multifora) is a starfish, a marine invertebrate, because it has no backbone. It is also called the Spotted Linckia or Multicolour Sea Star.
The starfish is an echinoderm (meaning prickly skin) in the Asteroidea class (meaning star-shaped).
It has five elongated tube limbs (feet or arms) pink or reddish mottled with white and yellow colours that taper slightly towards the tips.
The surface has a rough texture and is covered in granulations.
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The Blue Star starfish (Linckia laevigata) is also called the Blue Linckia. It is a marine (sea) invertebrate, because it has no backbone.
The starfish (also called a sea star) is an echinoderm (meaning prickly skin) in the Asteroidea class (meaning star-shaped).
It has five elongated tube limbs (feet or arms) that are dark or light blue with tips at each of the limb.
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Do animals eat seaweed?
Seaweed is not a true weed. It does not have roots or leaves. It is an algae-based organism.
Many animals eat seaweed. Some examples of animals that eat seaweed sometimes include turtles, walruses, manatees, birds, lizards, and even humans.
Photographer: Martina Nicolls
Martina Nicolls: SIMILAR BUT DIFFERENT IN THE ANIMAL KINGDOM
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The Marbled African Lungfish (Protopterus aethiopicus) is one of four species of lungfish found in Africa. It is found in the Nile River and Lake Victoria, and other lakes, swamplands and floodplains.
The Marbled African Lungfish is a dark-coloured or grey, long, eel-like fish with spaghetti-like pectoral and pelvic fins. It has a mottled or spotted pattern, and small blue eyes.
It has soft scales and a paddle-like tail. They can swim like eels or crawl along the bottom of the river in shallow freshwater with their little leg-like structures.
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The Gold Marble Angelfish (Pterophyllum scalare) is a tropical freshwater fish from the Cichlidae family, native to the Amazon River Basin in South America.
The Angelfish grows to about 15 centimetres (6 inches) is laterally compressed, which means that it is flat and thin in a vertical position. This enable it to move among river reeds and grasses.
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The Red Piranha (Pygocentru nattereri) is an omnivorous freshwater fish native to South American waters.
The Red Piranha grows to about 14-26 centimetres (5.5 to 10.2 inches) long.
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One of the most important fins on a fish is the tail fin, which is called the caudal fin.
Caudal fins – or fish tails – can be many different shapes. The main shapes are rounded, square, forked and lunate.
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External covering is the outside appearance of an animal. Animals can have fur, feathers, hair, short hair, long hair, smooth hair, bristles, skin, thick skin, moist skin, dry skin, scales, waterproof scales, small scales, overlapping scales, spikes, hard shells, soft shells, smooth shells, rough shells, wool, or no covering at all.
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There are many animals that are black and white, such as pandas and zebras.
The black and white pattern can be stripes, spots, patterns, or ‘block’ areas.
There are several theories why animals are black and white, such as that black and white is aposematic, countershading, or cryptically-coloured.
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Fins on fish help them swim.
Fins usually have bones and skin like a webbed appendage, or like a paper fan that can open and close.
Finlets are small fins. Finlets do not retract (close).
Not all fish have finlets.
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Iridescence means shiny with many colours. Many animals have iridescent colours.
Iridescence is structural colour from refracted light (crystals), diffraction gratings (feathers or butterfly wings), thin film (oily surfaces), multiple layer interference (nacre in shells), or 3-D arrays of spheres (opals).
The word iridescence comes from iris, the Greek word for rainbow. An iridescent object has many tones of colour. Iridescence creates colour by splitting and reflecting light from different structures – which is why it is often called structural colour.
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