1) When the sea cucumber can't get rid of the enemy's attack, it can use the double-body method to avoid it, and the internal organs are quickly thrown out of the anus. Natural enemies will pounce on the entrails of sea cucumbers when they see colorful delicious food. Sea cucumbers that have abandoned their internal organs can still live. (2) Barracuda can be divided into three types. One is barracuda in Taiwan Province province, which has two brown bands on its side, yellow tail fin and 40~50 cm long. Living in coral reef waters and shallow waters of inner bay, like to live in groups, with a speed of 60~70 kilometers per hour. One is dried fish, which is coastal and usually lives in groups in middle and surface water. (3) Squid is called "makeup artist" in the sea, because it really loves "dressing up". Squid is very good at expressing feelings through body color. Its body color changes suddenly, mostly because of fear and restlessness. During the breeding season, female squid express their love for the opposite sex with colorful colors. They often draw stripes on tree trunks, as if wearing beautiful pajamas. Among marine life, squid swims fastest. It moves forward quickly by the reaction force of water spraying from the funnel pipe in the abdomen, and can jump out of the water as high as 7 meters to 10 meters. Squid hides ink in its belly, which is rare in the animal kingdom. The ink sac is located in the abdomen of the squid, and there are ink glands in the sac, which can secrete thick ink and can be quickly replenished after spraying. When the squid suddenly meets a strong enemy, it uses this special defensive weapon to reverse itself. (4) Various conch shells with peculiar shapes and mottled colors. Among them, there are tiger-spotted shellfish, white jade shellfish, luminous shellfish, five-claw snail, pig mother snail, pearl oyster, chaste snail, tangguan snail, heptacodium snail, pig ear shell, horseshoe snail that can be used as ashtray, and bighorn snail that fishermen play. , are pleasing natural crafts, and all kinds of painted screens, utensils and decorations made of smooth and shiny shells are bright and beautiful. Pearl oyster is oval or disc-shaped, with a wheel ridge with scales near the edge. The hinge part is long, with small teeth at both ends, and the central surfaces of the two shells are generally light brown or gray with dense reddish-brown radial lines; It has a mother-of-pearl luster.