The question whether fish have brains is an interesting one. The answer is that they do not have the same kind of brains that humans do. Although they are not as complex as humans, they can still understand and make sense of things. They can even remember things and carry out tasks for long periods of time.
Betta fish do have tongues
It is hard to imagine a fish without a tongue. But there are plenty of species that do not have one. Among them are some species of freshwater fish, such as goldfish and betta fish.
Unlike whales and dolphins, which do not possess taste buds, bettas do have a variety of them. These tiny organs are located on their fins, tail, and gills. Fish can distinguish between sweet, sour, salty, and bitter flavors.
Bettas can even taste food before it reaches their mouths. This is because of the way their tongues work. They are also able to suck up prey from crevices in rocks and plants.
Bettas have several other taste receptors on their body, including on their gills, fin, and mouth. However, these are not as developed as those found on human tongues.
Manta rays have huge brains
Manta rays are among the most intelligent creatures in the ocean. Their brains are ten times bigger than the brains of whale sharks. They have the biggest brain-to-body ratio of any cold-blooded fish.
Manta rays are highly social animals. Often they interact with humans in playful ways. It’s not unusual to see a manta school jumping together at dawn or even diving to explore deep waters.
Scientists have found that manta rays may be as self-aware as dolphins and apes. However, further tests are necessary to prove the theory.
According to Dr Csilla Ari, director of the Manta Pacific Research Foundation, there is evidence to suggest that mantas are self-aware. This includes their ability to recognize themselves in a mirror.
One test involving two captive manta rays revealed that when the rays were in front of a mirror, they behaved in a way that is familiar to humans. When they saw their own reflection, they rolled their fins around their mouths more often.
Jellyfish don’t drown because they don’t breathe through their gills
Jellyfish are a common name for the water-based creatures that inhabit the world’s oceans. These animals have been around for thousands of years. They have been discovered at the bottom of the ocean, as well as near the surface.
Jellyfish are composed of mostly water, with the exception of a small amount of solid material. These animals do not have a heart, brain or bones. Instead, they have a simple nerve network that allows them to detect light and stimuli.
Many jellyfish species are predators. They eat plankton, and some are poisonous. The box jellyfish, a particularly deadly type of jellyfish, has tentacles covered in tiny barbs and sensory hairs. When their tentacles come in contact with humans, they can sting them.
Jellyfish are osmoconformers, meaning they match the salinity of the sea. They also have a simple digestive system that absorbs nutrients and traps food.
Marine sponges have internal pores and channels with which they can pump water
A marine sponge is an aquatic animal characterized by its internal pores and channels, with which it pumps water. They are multicellular and heterotrophic. They are generally modular organisms that can regenerate from a few cells.
Sponge skeletons are made of silicon dioxide and calcium carbonate. The internal gelatinous matrix called mesohyl is stiffened by mineral spicules. Some sponges also have sieve membranes.
Sponge pumping is primarily driven by amoebocytes. The amoebocytes produce spongin. These cells are derived from stem-cell-like archaeocytes. They phagocytose and trap micro-food particles. Amoebocytes also give rise to sclerocytes, which secrete mineralized spines and spicules.
In addition, sponges are able to absorb dissolved nutrients from the seawater. These nutrients can pass directly from collar units to the rest of the sponge. This ability to pump can be enhanced by choanocytes.
Long-term memory
Research indicates that fish have good memory. Whether it is the ability to remember where they went last or what time it is, they have it.
A study done at Plymouth University showed goldfish to have a stronger memory than was previously thought. These creatures memorize their surroundings, use a “response” strategy and even use a “place” strategy to locate their next meal.
Other researchers have found that fish have long-term memories as well. Some have even observed sharks avoiding being caught after they’ve been released into the wild.
The telencephalon is a major brain component, and researchers have shown that it has different development levels. One part of the telencephalon has been identified as being involved in recognizing the smallest of things, like a small coin.