What is the difference between a dogfish and a catfish

Despite their common name, not all catfish have prominent barbels; what defines a fish as being in the order Siluriformes are in fact certain features of the skull and swimbladder.

Catfish are of considerable commercial importance; many of the larger species are farmed or fished for food, and some are exploited for sport fishing, including a kind known as noodling.

Many of the smaller species, particularly the genus Corydoras, are important in the aquarium hobby. The name dogfish is applied to a number of small sharks found in the northeast Atlantic, Pacific, and Mediterranean, especially to those in the three families Scyliorhinidae, Dalatiidae and Squalidae. Although often used in reference to Scyliorhinus canicula, the name is applied only loosely and does not usually signify a close taxonomic relationship.

Squalus acanthias -- This small, slender shark has a flattened head and a snout that tapers to a blunt tip. Records show that they can live from 25 to 30 years. Its mouth is full of low, flat, grinding teeth like the smooth dogfish, but the spiny dogfish also possesses an extra set of small, very sharp teeth. The spiny dogfish, Squalus acanthias, is the most common shark in the western Atlantic.

It hunts both alone and in groups with other dogfish. It eats small fish, squid, and crustaceans, and has extremely strong jaws for crushing shells. Dogfish are considered a nuisance by fishermen because they will latch on to almost anything put in the water, including human hands.

Fishermen kill them when caught which, along with pollution, has contributed to a sharp decline in population in Puget Sound. It is now illegal to kill or mutilate them when caught even though at a time, they were considered a delicacy by Europeans.

Care must be taken when handling dogfish due to the two venomous spines at the back of both dorsal fins. The venom is not likely to cause major damage, but the wound can take months to heal. Yes, because dogfish are sharks. A clownfish has alot of color and a catfish doesn't. A catfish has a stinger that comes out of its back and a clownfish doesn't. Yes you can eat catfish. Males have a two pelvic claspers, and are very obvious. Females do not have claspers, but have instead have a cloacal opening between the pelvic fins.

Yes, sharks will eat catfish and dogfish, and any other fish that crosses its path. A person can find pictures that show the difference between the genders of catfish in a book about catfish. Latest Comparisons Tubercule vs. Glyptal vs. Faucet vs. Com vs. Destroyable vs. Aboriginal vs. Coelomate vs. Ocean vs. Judge vs. Flag vs. Forbear vs. Awesomely vs. Fat vs. Sonhood vs. Ricochet vs. Channel vs. Trending Comparisons.

Mandate vs. Ivermectin vs. Skinwalker vs. Socialism vs. Man vs. Supersonic vs. Gazelle vs. Catfish depend on stealth and speed to approach prey and consume them. In the wild, dogfish are eaten by bigger aquatic animals such as seals, bigger shark species and birds big enough to be predators.

Commercially, catfish have more value than dogfish. Catfish are in high demand, and they can easily be caught and sold in the market by anglers who prefer to fish in rivers. To catch dogfish, you will need to head out to the seas in a large fishing boat with buckets of live bait because they are mainly carnivorous. The catfish can be caught using the regular circle hook attached to a rig. Anglers prefer to use the claw hook when hunting for dogfish. The claw hook holds fast when the dogfish is trapped and prevents the fish from escaping.

The process of catching catfish is relatively simpler. Behind this publicity stunt lies real concern over the stocks of cod and haddock. And does colin and chips sound like a nice Friday night treat? Beneath the waves is another master of disguise in the form of the killer whale. These phenomenal black and white predators aren't whales at all but the largest member of the dolphin family.

They're perhaps more accurately referred to as orcas. Their scientific name orcinus orca comes from Orcus, the ferocious Roman god of the netherworld. Back on land, thankfully the majority of our mammals have solid, dependable common names but there's always room for a little regional variation. Any ideas what royal hunters, red nannys or hedgepigs might be better known as?

Pine martens are sometimes known as sweetmarts, possibly due to their sweet-smelling 'scats' or poo. Stoats , meanwhile, go through a complete transformation in the winter, taking up the title ermine to complement their white coats. According to the folks at Buglife , many of these names are related to the 'rolled up' appearance of Armadillidium woodlice, while slaters are seashore dwellers or water lice. If you're as baffled by all this as I am and want to know the official name for your woodlouse try the Natural History Museum's identifier.

With thousands of 'creepy-crawlies' it's perhaps unsurprising we use one name to describe lots of different species. Daddy long legs for example can be crane flies, harvestmen or cellar spiders in reference to their spindly limbs. For every perfectly descriptive common name there's a very misleading one.

Take for example the slow worm. Is it a worm? Is it a snake? No, it's a legless lizard! And not a particularly slow one either! Up in the skies, our bird populations have more aliases than James Bond. Did you know that feral pigeons are domesticated rock doves?

You can still find wild rock doves in parts of Scotland but the familiar grey scavengers on our city streets are the product of centuries of breeding for domestic purposes such as carrying messages.