The Smooth Hammerhead shark (scientific name: Sphyrna zygaena) is a species of hammerhead shark. Its head is flattened and has a hammer-like shape. The eyes are positioned at the ends of the hammer. The rear edge of the hammer-shaped head is straight and has a notch in the middle. It has a slim and elongated body. The pectoral fins are long and have a curved shape. The first dorsal fin is tall and pointed. The color of the Smooth Hammerhead shark's body is a grayish-blue with a white ventral side.
The Lemon Shark is distributed in the Western Indian Ocean and Central Pacific Ocean, ranging from the Red Sea and the eastern coast of Africa in the west, to the Marshall Islands and Tahiti in the east. It can be found as far north as Japan and as far south as Australia. In China, it is found in the waters of the South China Sea and the southern waters of Taiwan.
1、Anchor worm, signs of infection. Female anchor worms, they are parasites and can be easily recognized based on their appearance of worm-like attachments to the fish's body. In spring, when two approximately 3mm egg sacs form at the free end of the body, they can reach a maximum length of about 20mm.
2、Black spot disease, signs of infection. Small black or brown spots, up to 2mm wide, appear on the body and fins, sometimes also on the eyes and mouth.
3、Cloudy eye, signs of infection. One or both eyes of the fish become clouded and have a whitish appearance.
The Lemon Shark, also known as Negaprion acutidens, eats 10 live goldfish every day; it requires 4 oxygen pumps and one water pump to work 24 hours a day. If there is no oxygen pump for oxygenation, it will die within an hour; it also needs a fish tank that is 2 meters long, 80 centimeters wide and 1 meter high, with 2 tons of seawater in it. Lemon Sharks live in seawater, and if the water quality decreases, they will get sick, so the seawater needs to be changed once a year.