The main diet of the siamese algae eater, as its name suggests, is algae. Periphyton and phytoplankton are all part of their diet. This is an omnivorous fish and eats small insects and dead fish and plants and keeps the tank clean of black beard algae. They sometimes even eat small baby fishes found in the vicinity. Basically, they enjoy eating anything that fits in their mouths. In an aquarium tank full of plants, the fish eats bacteria and any other microorganisms growing in the tank. Algae wafers and bloodworms are their favorites among the fish food, but overfeeding it will not solve the purpose, as the fish will stop eating the algae in the tank since the fish can eat all day long. Ideally, the fish should be fed just once a day
Handfish grow up to 15 cm (5.9 in) long, and have skin covered with denticles (tooth-like scales), giving them the alternate name warty anglers. They are slow-moving fish that prefer to 'walk' rather than swim, using their modified pectoral fins to move about on the sea floor. These highly modified fins have the appearance of hands, hence their scientific name, from Latin bracchium meaning "arm" and Greek ichthys meaning "fish". Like other anglerfish, they possess an illicium, a modified dorsal fin ray above the mouth, but it is short and does not appear to be used as a fishing lure.
The sand diver has a long body, a head that resembles a lizard, a wide mouth with sharp teeth and striking eyes. They also have pectoral fins that resemble legs and a fanned dorsal fin on the back. Sand divers can often be found partially buried in the sand, on shallow coral and rocky reefs. Sand divers are lightning quick when it comes to attacking their prey. They grab and attack their prey with their needle-like teeth. They feed on invertebrates and small fish. The sleek and quick sand diver is a master at camouflage. They are hard to spot because of their white to pink coloring that can mimic sponge or a vibrant reef.
Every blue ribbon eel is born as male. Juveniles and sub-adults are black with a yellow dorsal fin. When they reach adulthood, they keep the yellow fin but the body turns blue and starts developing female reproductive organs. When they reach their full size, they turn into female and change their color to complete yellow. They will then find a mate, lay their eggs, and die within a month. It is due to their short lifespan that the female ribbon eels are rarely observed.
Neptune's grass (posidonia oceanica) is a vascular plant, so contrary to the seaweed, it has leaves, stems and roots, and it produces flowers and fruit, but it is submerged. These plants make meadows, more or less big clusters which has leaves that grow up to the sediments. Leaves are in the shape of flat stripes that are 1 cm wide and from 10 to 150 cm long, depending on the season. Neptune's grass clusters make large underwater meadows, which are stable and long-lasting, but which can sometimes be affected by a delicate environmental balance. Posidonia oceanica is very sensitive to pollution, so it is thought to be a good indicator of water cleanliness. The increase in contamination levels on the coast has resulted in a decline of meadows. The building of purification systems and the quality control measures are improving the situation, but the meadows grow slowly and take decades to recover.
In Gisborne, New Zealand, a resident elephant seal, named Homer, had an infamous reputation for hooliganism. He used to routinely overturn parked cars in town and once even knocked over a restaurant's power supply box. Experts believed that Homer's energetic ‘rubbings' were actually ever-so-slightly misguided sexual advances.
Known as Fairy penguins, blue penguins, and little blue penguins, this species is the smallest of all penguins; a fully developed adult can weigh only 2.6 lb. They have a fragile and delicate appearance highlighted by a bluish color unique among all species of penguins. Little blue penguins are mainly nocturnal as they perform most of their activity during the night creating small groups of about ten members or less. They are not migratory and stay close to their colonies most of the time. Predatory birds like skuas, gulls and sheathbills are the primary predators of eggs and chicks, while introduced animals like rats, dogs, and cats can be a problem for both chicks and adults.
A boops boops fish has a lateral-long and a slightly compressed body. The scales of a bogue are sliver with white and yellow hues and the upper half of its body has four to five mustard yellow longitudinal stripes. The eyes are the most noticeable feature of this species as they are large, circular, and silver-gray with black pupils. The boops fish size can reach a maximum of 14 in (36 cm). The name boops boops is a romanization of the Greek boōps which means "cow eye." In most languages its common name refers to the fish's, large bugged out eyes.
Ruho is pure vegetarian fish; however, their food preference changes with the change in their age. The diet of rohu fry consists mainly of zooplankton, whereas rohu adults feed on phytoplankton and submerged plants. They also like to feed on bread, which is hence used as bait to catch them on a hook. In their organic environment, this fish mainly feeds by sieving the water with the help of their thin hair-like gill rakers. Since they do not have any teeth in their jaw, the fish feeds by nibbling the food using their mouth.
The spawning behavior of the California grunion is one of the most unusual of all marine fishes. They are the only California fish known to strand themselves on the beach to deposit their reproductive products in the moist sand. Females, accompanied by up to eight males, swim with waves washing onto the beach, dig into the sand up to the pectoral fins, and lay eggs. The male wrap themselves around the female and fertilize the eggs. With the next wave, the fish return to the sea. Spawning takes place from early March through September, and then only for three or four nights following the full or new moon immediately after high tide. Most females spawn from four to eight times per year, and may produce up to 3,000 eggs every two weeks.