What kind of fish have scales?
Most bony fishes are covered with the cycloid scales of salmon and carp, or the ctenoid scales of perch, or the ganoid scales of sturgeons and gars. Cartilaginous fishes (sharks and rays) are covered with placoid scales.
Which of the following is a fish with dermal denticles?
Cartilaginous fishes (e.g., sharks and skates) possess a postcranial dermal skeleton consisting of tooth-like “denticles” embedded within their skin.
What type of fish have cycloid scales?
Cycloid scales are most often found on advanced fish species, such as trout, herring, and carp. However, fish are not necessarily covered in a single type of scales. Some species, such as flounders, have ctenoid scales on one side of the body and cycloid scales on the other.
Which fish has Placoid scales?
Placoid scales are found in sharks and rays, and can vary greatly in external appearance. Unlike the scales of bony fishes, placoid scales do not increase in size as the fish grows, instead new scales are added between older scales. Placoid scales are often referred to as denticles.
What’s wrong with tilapia?
Tilapia is loaded with omega-6 fatty acids, which we already eat too much of in our modern society. Excess omega-6 can cause and exacerbate inflammation so much that it makes bacon look heart-healthy. Inflammation can lead to heart disease and also exacerbate symptoms for people suffering from asthma and arthritis.
What do the denticles on a shark do?
Shark skin is covered by tiny flat V-shaped scales, called dermal denticles, that are more like teeth than fish scales. These denticles decrease drag and turbulence, allowing the shark to swim faster and more quietly. Olympian swimsuit designers have taken a page from the shark’s playbook and created a fabric…
When do denticles stop growing in bony fish?
This is covered with an enamel-like vitrodentine, which provides a hard outer casing. While scales in bony fish grow as the fish gets large, dermal denticles stop growing after they reach a certain size. More denticles are added later as the fish grows. Learn Why Shark Skin Is So Rough Meet the Blue Shark and Its “Love Bite” Mating Ritual
What kind of fish has tentacles on its scolex?
Trypanorhynch cestodes are parasitic in fish. Their scolex shows four tentacles which are covered by spines. These tentacles help the adult cestode to attach to the intestine of the shark or ray that they parasitize. The same tentacles are also present in the larvae.
What kind of animal has tentacles around its mouth?
Bryozoa (moss animals) are tiny creatures with tentacles around their mouths. The tentacles are almost cylindrical and have bands of cilia which create a water current towards the mouth. The animal extracts edible material from the flow of water. A larva of trypanorhynch cestode (only two tentacles shown).
What kind of fish has long pink tentacles?
The Sebae Anemone, scientific name Heteractis crispa, has long thin tentacles with a pink dot at the center of each. It is an Indo-West Pacific Anemone that many species of clown fish will associate with. The Malu Anemone, Heteractis malu, is a species with highly variable coloration and a long “stalk” that it buries in the substrate.
Trypanorhynch cestodes are parasitic in fish. Their scolex shows four tentacles which are covered by spines. These tentacles help the adult cestode to attach to the intestine of the shark or ray that they parasitize. The same tentacles are also present in the larvae.
Bryozoa (moss animals) are tiny creatures with tentacles around their mouths. The tentacles are almost cylindrical and have bands of cilia which create a water current towards the mouth. The animal extracts edible material from the flow of water. A larva of trypanorhynch cestode (only two tentacles shown).
What kind of jellyfish has hair like tentacles?
Cnidarians and ctenophores. Cnidarians, such as jellyfish, sea anemones, Hydra and coral have numerous hair-like tentacles. Cnidarians have huge numbers of cnidocytes on their tentacles. In medusoid form, the body floats on water so that the tentacles hang down in a ring around the mouth.
