Why do crayfish turn blue?

When diet low in carotenoids (forms of vitamin A), the crayfish loose the ability to develop reds and yellows in the exoskeleton. The exoskeleton then takes on a bluish cast. A complication can involve loss of appendages during molting process.

FAQ

• Should you gut fish immediately?

  What's the best way to keep fish fresh after catching? Ideally, you'll want to bleed and gut fresh fish immediately after catching them, and then keep them on ice until you cook them on the same or the next day. Raw fish should only be kept in the fridge for 1 or 2 days before eating it.

• Can koi live with shrimp?

  You can safely feed them shrimp, sardines and even crayfish. Just be sure that if you're using a frozen variety, that they're thawed beforehand. Large koi can consume shrimp whole, or chop them into pieces for smaller koi. Shrimp are full of nutrients and make a healthy, tasty snack.

• Why do shrimp taste like iodine?

  Bromophenol is what gives the fish the iodine smell and flavor. It comes from the fish eating algae or worms high in blomophenol or from eating shrimp that have recently consumed organisms high in bromophenol.

• Can a fish bone get stuck in your chest?

  What is esophageal foreign body? Esophageal foreign body is an object you swallowed that got stuck in your esophagus (throat). Examples include dental work and button batteries. A piece of food or a fish bone can also become stuck in your esophagus.

• What fish could kill you?

  Almost all pufferfish contain tetrodotoxin, a substance that makes them foul tasting and often lethal to fish. To humans, tetrodotoxin is deadly, up to 1,200 times more poisonous than cyanide. There is enough toxin in one pufferfish to kill 30 adult humans, and there is no known antidote.

21 Related Question Answers Found:

• Can we debone Rohu fish?

  Enjoy his amazing rohu fish cutting techniques and ... Deboning fish without ruining the whole fish will require you to first take a knife behind the head. Debone fish without ruining the ...

• How long do chub fish live?

  25 years It can take 6-10 years for the chub to reach a pound in weight and a specimen of five pounds may be twenty or more years old. Chub can live for 25 years, and probably nearer 30 and unlike most coarse fish they will continue to grow in length for almost all of their lives.

• How do you know if a fish is a boy or girl?

  Males are often slimmer but larger-bodied than females and are more vibrantly colored. The dorsal and anal fins of the male are more pointed, larger and more flowing than in the female. In many species, the male will display egg-shaped markings on the anal fin known as egg spots.

• Is ahi tuna from Vietnam safe to eat?

  Christine Blank. Retailers, restaurants, and importers should discard all yellowfin (ahi) tuna from a Vietnamese supplier linked to scombrotoxin poisoning in the United States ...

• How do you revive freezer burnt shrimp?

  It is safe to eat freezer-burned shrimp without any fear of food poisoning. Simply incorporate it in a dish preferably stew to re-hydrate and make it palatable or use herbs and spices to mask the freezer burn taste. If the shrimps are entirely discolored or have a strong ammonia smell, it is best to discard them.

• Can I use Walmart fish for sushi?

  Yes. Some raw fish from higher-end grocery stores can be eaten raw. Look for the best, freshest fish and ask the fishmonger which is freshest. You may also see fish labeled as “sushi grade,” “sashimi grade,” or “for raw consumption.”

• Are worms in salmon normal?

  Reportedly, worms crawling around on packaged salmon for sale is normal. Experts say the fish needs to be cooked to kill the worms and other parasites. Still, most consumers who find worms on salmon purchased from Costco or any other retailer are bound to be repulsed.

• How do you make shrimp not tough?

  How to Keep Shrimp Tender While Cooking

  1. Defrost shrimp in the refrigerator -- not at room temperature or in the microwave. ...
  2. Don't let boiled shrimp cool in the cooking water, as they will continue to cook and won't be tender. ...
  3. Serve grilled shrimp immediately, while they are still hot.

• Why is cod fish so popular?

  Cod has been an important economic commodity in international markets since the Viking period (around A.D. 800). Cod are popular as a food fish with a mild flavour, low fat content and a dense white flesh. When cooked, cod is moist and flaky. Cod livers are processed to make cod liver oil.

• Does a good fishing rod make a difference?

  A quality rod does make a difference. The extra money buys you more sensitivity, graphite construction, and longer rods that enable us to cast further, control fish better, and drop our lure with pinpoint accuracy.

• How do you remove toxins from fish?

  - Immerse fruit or fish in salt water for one-and-a-half hours. After that, immerse it in vinegar-water solution (20% vinegar, 20% water) for another hour. - For fruits, immerse them in salt water for an hour and then wash them with normal water.

• Can you eat oysters with worms in them?

  "They tend to abandon their mud burrows after the oyster has been removed from the water and actually can be a sign of fresh harvest. The bigger question, are they safe to eat? Supan says yes. "They are absolutely harmless and naturally occurring," he added.

• How big can a tilapia get?

  Typically, tilapia have a long dorsal fin, and a lateral line that often breaks towards the end of the dorsal fin, and starts again two or three rows of scales below. Some Nile tilapia can grow as long as 2.0 ft. Other than their temperature sensitivity, tilapia exist in or can adapt to a very wide range of conditions.

• Should I score fish skin?

  Why not score the skin? You want to avoid drying out the fish. There's a little layer of fat under the skin that keeps the flesh moist during high heat cooking. If you score, that fat will be released into the pan and the fish will lose its moisture.

• Are salmon populations declining?

  There are many reasons for the decline in salmon populations. ... Overfishing is another source of death that can contribute to the decline of salmon. The weather affects the amount of food that is available to salmon in the ocean. Pollution and disease have also contributed to population declines.

• Can you buy canned clams?

  Canned Clams There are a few different varieties of tinned clams available. When you buy chopped clams, these are generally Atlantic surf clams. They are sweet in flavor and have a firm texture. You can buy chopped clams in almost any grocery store.

• Why do I have so many snails in my fish tank?

  If you have snails in your tank, you put them in there. The most common means is through adding live plants. Snails, or their eggs, can hitch on most types of plants and arrive in your home aquarium.

• Is it better to boil or steam shrimp?

  Steamed shrimp is much tenderer than boiled shrimp. As for the flavor, I amped it up by making sure the water was heavily salted. Steaming the shrimp cooks them thoroughly in 2 minutes or so, depending on their size. Then you chill them briefly in ice water to stop the cooking and pat them dry.

• How do you prepare catfish before cooking?

  Season catfish with salt and pepper, then dredge fish in seasoned cornmeal, pressing to coat. Place fish on prepared baking sheet and drizzle with remaining 2 tablespoons oil. Bake until golden and fish flakes easily with a fork, 15 minutes. Serve with lemon wedges.

• What does fried clam taste like?

  It has a silty, almost bitter flavor to it with a hint of sweetness, and it should burst in your mouth like an ocean-flavored Gusher.

• Is fish from Japan safe to eat?

  Nearly five years after the Fukushima Daiichi nuclear disaster, most seafood caught off the coast of Japan is safe to eat, according to a new study. ... Some fish, including large bottom feeders and freshwater fish and crustaceans, did have higher levels of cesium, but only those near the Fukushima area.