The mangrove killifish is both male and female; it self-fertilizes for its entire reproductive life. In fact, about 2 percent of fish species display some kind of hermaphroditism, or roughly 500 different species worldwide. Clownfish carry both female and male reproductive organs. Can two male clownfish mate? Two males will become mates and the larger,…

Is seaweed bad for fish? Tropical fish have evolved to digest aquatic based veggies more so than we humans typically eat. Seaweed and other aquatic based algaes are best for both tropical and marine fish and they can help improve the immune system and offer anti-inflammatory benefits also. Is dried seaweed good for fish? Laver…

Many species of fish, like the kobudai, are known as “sequential hermaphrodites”: they can switch sex permanently at a specific point in their lives. The majority of “sequential hermaphrodites” are known as “protogynous” (Greek for “female first”): they switch from female to male. Do fishes have genders? You can determine the sex of your fish…

Can you drown a fish pulling it backwards? Knowing what you now know about fish, gills, and all the amazing wonder that fish are, you could be wondering can fish suffocate if they are pulled backwards through the water. The simple answer is yes, they can. Their gills can’t gain access this way as easily….

Gills and lungs are designed for use in water or air, and they’re much more efficient in their natural habitat than the other. By considering the word “drown” you realize that fish don’t die through the inhalation of water. So while fish can’t drown, they can go through a similar experience when out of water…

Krill – a shrimp-like crustacean – forms the basis of the marine food web for whales, seabirds, fish, squid, seals, and sharks throughout the world’s oceans. Commercially valuable salmon, rockfish, flatfish, sardines and squid thrive on krill. When abundant, animals migrate thousands of miles to feed on krill. Do large fish eat krill? Antarctic krill…

Fish get infected with parasites when they feed on intermediate hosts. The definitive host for fish roundworms are marine mammals like seals and dolphins and birds that feed on fish like cormorants and seagulls. These hosts shed eggs in their faeces which hatch into larvae in the water. How do you treat intestinal parasites in…

Nearly 1/3 of all freshwater fish are threatened with extinction. In 2020 alone, 16 freshwater fish species were declared extinct. Since 1970, mega-fish—those that weigh over 66lbs—have declined in number by 94% and migratory freshwater fish saw a 76 % decline. What year will we run out of fish? The world’s oceans could be virtually…

There are a variety of reasons why a fish might kill those of its kind, and you’ll be having a killer in your aquarium. Surprisingly, some of the most sociable fish can exhibit aggressive behaviors from time to time. As a result, they engage in aggressive competitions and also end up killing each other. Do…

It can leave a fishy taste in your mouth or make you a little gassy. The much more serious concern is how krill oil might interact with other drugs you take. Does fish oil make you gassy? The most common side effects from fish oil are indigestion and gas. Getting a supplement with a coating…

What is the best hook size surf fishing for sharks? The best hook size for catching sharks off of the beach is a stout 5/0 circle hook. This hook size will catch smaller 3 foot sharks all the way up to a 6 footer. If you want to go bigger than that then you will…

Can fish survive if they lose an eye? Fish have an amazing ability to heal, and as long as there are no underlying disease problems, they will frequently recover from a lost eye. Once the eye itself is gone, scar tissue will quickly fill the orbit (socket), and within a matter of several weeks, the…