Sally Lightfoot crabs are brightly-coloured coastal scavengers, found in the Galapagos Islands and across the western coast of South and Central America. They have an extremely generalist diet, feeding on anything from sea lion placenta to other crabs.

It feeds on algae, sometimes sampling plant matter and dead animals. It is a quick moving and agile crab and hard to catch, but not considered very edible by humans. It is used as bait by fishermen. Sally Lightfoot Crabs are usually very energetic and can be entertaining to watch.

Diet & Feeding: This crab is an omnivore, consuming detritus and algae in an aquarium. If insufficient food is available, its diet should be supplemented with seaweed and meaty items. When it grows to a larger size, this crab can become aggressive and catch and eat small invertebrates and fish.

Sally Lightfoot Crab is feeding primarily on algae (including a wide variety of algal meals), but also on animal food (such as copepods, worms, snails, crustaceans and jellyfish), and is considered an opportunistic feeder.

It’s unknown exactly how long Sally Lightfoot crabs live in the wild due to predation. They’ve been known to live up to 12 years in captivity.

The Emerald Crab is well respected for its scavenging ability. It will enthusiastically feed on uneaten meaty foods and many types of nuisance algae. However, when well fed, most Emerald Crabs are very tolerant of their tankmates and highly compatible in reef environments.

around two inches

Emerald Crabs can be aggressive to each other. Therefore, if you have a small tank, it will be better to have only one crab or a pair of the opposite sex.

Emerald crabs are not capable of catching a healthy fish.

They will not attack and kill fish, but they will prey on sick/dying or dead fish. Only the larger species of hermits, such as my Red Starry Hermit, who’s about the size of a baseball, will actuall ‘attack’ and eat fish. I’d start looking at the Clown, to see if there was anything wrong with it.

Stocking wise, it is recommended to keep only 1 crab per 20 or 25 gallons. Some have reported that keeping them in higher concentrations could lead to aggression amongst themselves. They may also attack smaller snails so if you like your snails, you’ll need to keep an eye on your crabs.

Crabs. Marine Crabs are almost exclusively considered to be scavengers, eating almost anything in their paths including live animals. Some crabs, however, are more selective feeders, consuming uneaten food, detritus and rotting substances (i.e., dead fish) and can be beneficial in an aquarium.

Young marine eels will eat dead fish and crustaceans. Remoras swim near large fish and sharks and eat their leftovers. Sharks keep the ocean clean by eating dead or wounded fish.

Shrimp are bottom dwellers who feed on parasites and skin that they pick off dead animals. This means that every mouthful of scampi you eat comes with digested parasites and dead skin.

What do Nassarius snails eat? These snails don’t eat algae they eat carrion, which is a fancy word for dead fish and detritus/fish waste. That’s right, not only do they crawl out of the substrate like a zombie, but it also has a craving for flesh, not algae.

Snails and slugs have evolved to eat just about everything; they are herbivorous, carnivorous, omnivorous, and detritivorous (eating decaying waste from plants and other animals). There are specialist and generalist species that eat worms, vegetation, rotting vegetation, animal waste, fungus, and other snails.

One potential concern is the high amount of cholesterol in shrimp. Experts once held that eating too many foods high in cholesterol was bad for the heart. But modern research shows it’s the saturated fat in your diet that raises cholesterol levels in your body, not necessarily the amount of cholesterol in your food.

On the open ocean, however, flies and other insects are largely absent. And if the body is floating in water less than 70 degrees Fahrenheit (21 degrees Celsius) for about three weeks, the tissues turn into a soapy fatty acid known as “grave wax” that halts bacterial growth.

Summary Shrimp is very nutritious. It is fairly low in calories and provides a high amount of protein and healthy fats, in addition to a variety of vitamins and minerals.

1. Alaskan salmon. There’s a debate about whether wild salmon or farmed salmon is the better option.
2. Cod. This flaky white fish is a great source of phosphorus, niacin, and vitamin B-12.
3. Herring. A fatty fish similar to sardines, herring is especially good smoked.
4. Mahi-mahi.
5. Mackerel.
6. Perch.
7. Rainbow trout.
8. Sardines.

Shrimp ranks among Americans’ favorite seafood. While the mini-crustaceans may be small, they pack big nutritional punch. A bonus: One jumbo shrimp supplies only 14 calories, which means a half-dozen (about 3 oz.) add up to 84 calories—about 15 less than a 3-ounce chicken breast (about the size of a deck of cards).

Shrimp has less than a tenth of a gram of saturated fat in 3 ounces. Plus, there’s almost no trans fat in shrimp. The healthy fats in shrimp, like omega-3 fatty acids, can lower your blood pressure and odds of getting heart disease and stroke.

Health experts recommend that you eat seafood twice a week. That doesn’t mean you have to cook it twice a week.

Doctors now consider shrimp safe for most people to eat, whatever their cholesterol levels. In moderation, shrimp consumption can provide many essential nutrients.

A few changes in your diet can reduce cholesterol and improve your heart health:

• Reduce saturated fats. Saturated fats, found primarily in red meat and full-fat dairy products, raise your total cholesterol.
• Eliminate trans fats.
• Eat foods rich in omega-3 fatty acids.
• Increase soluble fiber.
• Add whey protein.

Fish. Not all seafood is created equally, however. The best in terms of lowering cholesterol are tuna, salmon, and swordfish. Sardines and halibut are good options, too.

Salmon, mackerel, and fish with omega-3s Fatty fish like mackerel and salmon are high in omega-3 fatty acids, which can lower blood pressure, reduce inflammation, and lower triglycerides.

Cholesterol and sodium: Shrimp are high in cholesterol and sodium; crab, lobster, and octopus are high in sodium. Battered and deep-fried shellfish and squid (calamari) top the charts in both cholesterol and sodium, which raise the risk for high blood pressure and heart disease (see table).

Eggs are also a well-known source of protein which is perfect for breakfast. Egg whites are especially good for high blood pressure.