In the morning, when the sun shines like gold to the sea, Yuluo is basking in the sun on the beach with a yawn and laziness. No matter what happens on the beach, it doesn't bother to take a look, who calls the beach side their most suitable habitat!
Morning Beach ( Network Map)
Yuluo (Network Diagram)
While Yuluo lazily enjoyed the "sunbathing", in the mangrove forest on the edge of the beach, a fierce high jump competition was being held. The contestant is a bouncer who can play mudskippers. They use their ventral fins as suckers, to grab trees, and to crawl or bounce upwards with their pectoral fins. No, one only bounced onto the trunk, the other jumped to a higher branch, and the scene of scrambling was not lively.
(Knowledge link: The gills of mudskippers have small openings around them, which can hold the water for one breath.) They can easily climb trees, so they can stay out of the water at high tide. ）
Mudskipper (network diagram)
Maybe the arena was so lively that no one noticed the loss of a small tidal crab that was sneaking out to play behind the rocks. Looking at everyone's elated look, it also wanted to join in. "Do you want to surprise everyone?" Di Di said to himself, My big is bright and bright in color, and it is suitable for the athletes to conduct, everyone will like it. ”
Tide Crab (Network Map)
Make up your mind, jump out and greet everyone with one of its big "pliers". But what it didn't expect was that before he could say anything, everyone was scared and fled. Even yuluo, who had always been lazy, stumbled into the sea, shouting while fleeing, "The little bully is coming, the little bully is coming, everyone run!" ”。
"Well, why are everyone afraid of me?" Seeing that everyone had fled far away, it couldn't help but be very disappointed, and it really couldn't understand why everyone was so afraid of it.
While everyone was running away, there was a playful little mudskipper still hanging on the trunk of the tree playing "innocently", completely unaware of what was happening. The mudskipper patriarch was angry and anxious, and he jumped on the trunk of the tree and slapped the tutu with his tail fiercely, fanning the guy back into the water at once.
The pained Tu Tu puffed up and said, "Isn't it just a little crab?" What's so scary, and why are you so afraid of it?. ”
"This little baby really doesn't understand things, don't you see that it is all walking sideways?" The people who run amok in the legend are not good people, don't you see its big sting? It hurts to be clamped down on it!. The mudskipper patriarch lectured it in disgust. Tu Tu listened to the words of the patriarch, not only was not afraid, but was also very unconvinced, but instead retorted to the patriarch that they "judge people by their appearance." ”
"It's not about judging people by their appearance, they are the most domineering of the crab family." Hermit crabs like their relatives are simply a robber who has occupied the home of the conchs. Yuluo was hugging his relatives and shouted from afar.
(Knowledge link: Hermit crabs use conch shells, shells, snail shells, and even bottle caps as a home.) When the hermit crab was born, the body was relatively soft and easy to be eaten, and when it grew up, it had to find a suitable house for itself, so it attacked the conch and tore the conch to pieces. Then drill in, hook the top of the shell with the tail, support the inner wall of the shell with several short legs, and crawl outside the shell with the long legs, and guard the shell mouth with a large claw. ）
Conch (network diagram)
Hermit Crab (Network Diagram)
"This... this...... What does the behavior of the hermit crab have to do with our tide crabs, although we are relatives, but people just want to play with you, and they don't want to hurt you. "Di Di cried bitterly.
"You are relatives, you are not much better at attracting tide crabs, and you are overbearing when you walk." I don't know who said weakly.
"Whoops, we don't want to go sideways either." We were born to walk sideways, our crab's steps can only move up and down, you can't tell us to elbow out. Our crabs are flattened, walking sideways to facilitate the use of low energy consumption, the fastest speed into the narrow cave, to avoid enemy attacks. It's a need to survive. Humiliated said.
(Knowledge link: Each step of the crab can only move up and down, just as a person's elbow cannot be turned outward, and the knee cannot be bent backwards. In fact, crabs can walk slowly forward, but their stride, speed, and efficiency are much lower than those of horizontal walking. The crab walking sideways is also related to the length-to-width ratio of its body, its left and right directions are wider than its head and tail direction, and the entire body is in a wide, flat shape, which is also convenient for entering the narrow cave at the fastest speed with low energy consumption and avoiding enemy attacks. In addition, other crabs that are not crabs, such as hermit crabs, are also straight, and many spider crabs living in seaweed bushes can climb vertically on seaweed. ）
"Don't believe it, it must be deceiving us with rhetoric, and when we get closer, it will definitely hurt us." It doesn't hurt small mudskippers now, it's putting long lines to catch big fish. Although Di Di explained it with all his might, everyone still did not believe it and talked about it.
Everyone didn't believe in the tidal crab, but the "naïve" little mudskipper tutu believed the tidal crab, and it comforted the still crying and said, "Don't cry, I believe you." After saying that, the little mudskipper got rid of the patriarch's obstruction, jumped off the branch, and climbed to the mud nearest to the "Little Bully" tide crab, to be friends with the little tide crab.
Tidal crabs and mudskippers (network map)
"Really? But we have no relatives and no reason, why do you believe me? "Because I'm so close to you, you haven't hurt me, and you're crying so wronged." Moreover, they are talking about your relative's 'crime' and your own feelings. It's a bias to understand how a person can hearsay? Understanding a person depends on getting along, through one's own eyes and judgment. Leave them alone, let's play together. ”
"No, no." Everyone saw the action of the small mudskipper, they all covered their eyes in fear and did not dare to look, thinking that this time the small mudskipper could cause trouble, thinking that the small mudskipper would definitely be "screaming" by the big stingers of the tide crab this time, and the mudskipper patriarch was also eager to give it two more "slaps".
But what everyone did not expect was that instead of hurting the mudskipper with its large tongs, the small mudskipper played happily on the mud. And they even eat "snacks" with the same taste, which is simply a coincidence!
(Scientific knowledge point: Why does throwing and losing does not hurt the mudskipper?) This is because the tide crab feeds on rotten shrimp and other rotten shrimp, and like mudskippers, they love to eat microorganisms on the beach and generally do not actively catch fish. When mudskippers jump on the shoals, they will shoot the microorganisms in the soil to the surface, providing a rich food for the tide-catching crabs. ）
Day after day, Tu Tu and Di Di play together every day, and the friendship is getting deeper and deeper. Everyone saw that they had such a good relationship and gradually changed their views. But they still feel that the reason why the tide crab plays with the mudskipper is because the mudskipper has a use value.
On this day, while eating the microorganisms that Tu Tu had made on the mud stall, he asked Tu Tu: "Tu Tu, thanks to you, I can enjoy so many delicious 'snacks'." What can I do for you? ”
"Oh, we're good friends, you're out of sight when you say that!" Tu Tu said with disgust. "However, our mudskipper family really has a big matter to solve recently, and for this matter, the patriarch is going crazy."
"Tell me about it, maybe I can help you." When he heard that he could help, he hurriedly urged Tu Tu to continue.
"Yes, our family has a special 'nursery', but the tide will destroy the cave, the children in the cave are facing the danger of severe lack of oxygen, we can only use our mouths to slowly pull out the sand grains in the hole, but if the tide is too urgent, it is too slow to rely on the mouth to pick up the stones." You say what to do. Tu Tu said bitterly.
(Scientific knowledge point: In addition to being used as a shelter, the cave of mudskippers can also be used as a nursery room.) Caves are critical to the safety of mudskippers, both adults and juveniles, but the water in caves is often severely hypoxic. Since the low tide will destroy the burrow of the mudflat fish, whenever the tide falls, the mud fish must use their mouths to get the sand grains inside the cave out. ）
"Don't worry, it's easy to do!" Take me to your house to have a look." After listening to the description of the mudskipper, it seems that there is a solution to the loss.
Together, they returned to the vicinity of the Tutu family, and the openings of the underground nests of the mudskippers were displayed in front of the lost eyes. "Hey, hey, hey." Only to see that he didn't say a word, he took a healthy step and "ran amok" up! "What are you doing?" Don't scare my people, they have a hard time shaking their minds about you. Tu Tu saw the strange behavior of losing and quickly stopped it.
"You'll know in a moment. Believe me, Tutu, I won't hurt your people. "Lose or go by yourself."
After a while, on the top of the mudskipper cave, there were countless footprints that were lost, and these footprints just left countless vents in the ground!
"Oh, I see! You're making vents out of our cave with footprints, you're amazing! Tu Tu kissed him excitedly and lost a big mouthful.
(Scientific knowledge: The tide will destroy the burrows of mudskippers, and the mudskippers and children in the holes will be at risk of severe lack of oxygen.) The footprints left by the tidal crabs on the ground can create oxygen for the underground caves, and can also make the sunlight make the caves incomparably warm. ）
The experience of losing helped to doodle and other bullets to mud mud fish is true Oh, do not believe it, please see a closer look at several middle school students in Nanning!
Seeing such a scene, the other mudskippers were dumbfounded. It turned out that they really misunderstood and lost it, and it was not used to smear. Losing is a good friend who is a good friend, because only a real good friend will sincerely help each other. The mudskippers were all ashamed of their prejudices just now, and they apologized and lost, saying that "judging people by their appearance" was wrong.
"It doesn't matter, probably because our crabs are walking sideways and there is a big sting, so you have misunderstood." However, we walk sideways, not because of the domineering, but to go faster; the pair of pliers, not to hurt others, but to protect ourselves and our family and friends. "Seeing that everyone has abandoned their prejudices against their own families, they are embarrassed to laugh.
"I'm so ashamed, I've lived a lot of years and can't get rid of the mistake of looking at people." It seems that when we treat others, we must retain one more point of 'innocence' like a small mudskipper, and reduce the prejudice of one point. The mudskipper patriarch sighed.
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Tips:
1. Conch: it belongs to the mollusk gastropods. Shellfish are mainly divided into five outlines, there are more than 70,000 species in the world, and marine species can be commonly referred to as conchs. The edge of the conch shell is slightly square in outline, large and thick, the shell is about 10 cm high, and the snail layer is 6 grades.
2 Jade snail: a kind of snail, seawater life. Family, molluscs, gastropoda, suborder progeminids, mesogapoda. After the snail crawls on the sand, due to the action of the forefoot hoe, it often leaves a clear trace, and the collector can follow the line of "footprints" to find it after low tide. The shell of the jade snail is spherical or gyroscopic, the spiral part is short, the body snail layer is expanded, and the shell surface is smooth or has a thin spiral pattern.
3, mudskipper: for the spiny fin fish family, there are 25 species of mudskippers in the world, according to their shape and behavior characteristics can be classified into four species; there are 3 genera and 6 species in coastal China, namely mudskipper, large mudskipper, green mudskipper, large green mudskipper. Mudskippers have gills and are real fish, a small type of ancient fish with a low degree of evolution.
4, the tide crab: the biggest feature of the tide crab is a pair of claws of different sizes, and the large claws on the front chest are like shields. The tide crab will make the action of dancing large claws, so it is called the tide crab. The purpose of this "tide-stirring" action is to intimidate the enemy with a large claw, or to court. Only the male crab has one large claw, and the female crab has both small claws. In addition, the tide crab has a pair of matchstick-like protruding eyes, which is very special.
5. Hermit crab: mainly based on the shell of the snail as the host, the maximum diameter of the largest snail in the hermitage can reach more than 15 cm. Its shape is between shrimp and crab, mostly inhabited by snail shells. The body is long, divided into head, thorax and abdomen. Hermit crabs are easy to find in the rock crevices of the beach and the sea, and sometimes this omnivorous animal known as the "scavenger" can also be seen in other places such as spikes of coconut shells, corals, sponges, etc.
Resources:
1. "The Wronged Little Crab"
2. Baidu Encyclopedia
3. "Why Crabs Walk Sideways" (video)
4. Why do crabs have to walk sideways? 》
5. Why do crabs walk sideways? 》
6. "Exploration of the Symbiotic Relationship between Mudskipper Fish and Tidal Crab"