The Crab 
Credit: https://500px.com/JohnDickens. Used under a CC 3.0 license.
The photo of this attractive fellow was taken on the shores of Singapore. This species may also be found on other shores in the Indo-Pacific region. The horn-eyed ghost crab earns its name because of the fantastic speeds at which it scurries across the sand. A nocturnal creature, it is difficult to spot, largely because it may be running at a rate of about 4.66 miles per hour. Given its size, this makes it one of the fastest land animals on earth.
Three Types of Crab
Crabs need to breathe, which raises the question, how do crabs breathe on land an in water? All crabs breathe through gills, but depending on where the crabs live the gills are adapted to collect oxygen differently. Aquatic crabs, intertidal crabs and land crabs have each adapted so specifically to their environments that a land crab would drown in water and an aquatic crab would suffocate on land.
The horn-eyed ghost crab featured above is an intertidal crab. It can spend long periods on land but must return to water at some point to moisten its gills. Without moisture, its gills cannot absorb oxygen.
Credit: Sasha Isachenko. Used under a CC 3.0 license.
The red king crab may be found in the northern Pacific, the Bering Sea and the Barents See. It may live 200 feet below the sea. It spawns and mates in shallow waters, and then returns to the sea.
The crab can have a lifespan of 15 to 20 years. In order to grow, a crab must molt. It must shed its hard shell and then grow another. Molting is so physically stressful that it may cause death. Also, a molted crab no longer has a hard shell to protect it, and therefore is more susceptible to predators. However, the greatest threat to the survival of the king crab is human activity, specifically over fishing.
Credit: Drew Avery. Used under a CC 2.0 license
This crab may be found in only a few areas: Ascension Island in the South Atlantic, and three Brazilian Islands (Trindade, Fernando de Noronha, and Atol das Rocas). It is the largest native land animal on Ascension Island. Most Johngarthia lagostoma crabs are yellow, but a small number may morph to purple. Though this is a land crab, it migrates to the shore in order to breed. The larvae are marine.
Credit: Ben Tullis. Used under a CC 2.0 license.
This crab molts, as other crabs do. It also can lose a limb and regrow it. However, "if a claw is forcibly removed, the crab can die from fluid loss". Johngarthia lagostoma land crabs breathe with gills, like other crabs. They get the water needed from dew and mist. If you submerge one of these crabs, it will drown. The crab's lifespan is 20-30 years
Random Crab Facts
Crabs are arthropods
All crabs have ten legs (they are decapods.) Their two front legs are used for claws
All crabs have a hard shell (hermit crabs are not true crabs. They ‘borrow’their shells)
Most crabs are scavengers and opportunistic hunters
Predatory behavior of crabs can include cannibalism.
Image credit: Gillfoto. Used under a CC 4.0 license. Dungeness crabs are scavengers and predators. They may be found from central California to the Gulf of Alaska.
My Collage
As soon as I saw #shaka's template photo, I knew the lobster was going to be the star of my collage.
@shaka's photo
At first I went in a more predictable route (to me it seemed predictable, anyway).
Then, somehow, I thought of poker players. I found this famous picture by C. M. Coolidge on Pixabay.
I replaced a couple of the dogs with lobsters. Added a bar next door (from StockSnap onPixabay.
Added a couple of sets of playing cards Pixabay and Pixabay.
A Pixabay cigarette and cigar.
The added personalities came from Paint 3D.
Gimp, Paint and Paint 3D were used to manipulate the photo, and add effects, such as smoke.
The hermit crab in my accent GIF also came from Paint 3e
It was fun coming up with an idea for @shaka's picture this week. I tried to do the unexpected. But who knows what is expected. Thank you @shaka for the LMAC community. We make collages every week. We are are creative, and we are colleagues.
Rules for the LMAC contest may be found at @shaka's blog. The community welcomes everyone. Check out the Discord channel to connect with members, and our school with lessons written by the amazing @quantumg.
Finally, please visit the LMAC community to see other remarkable collages that have been, and will be, created this week.
Thank you, @shaka, and everyone in the community.