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#aratus pisonii
thenativetank · 2 years
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Native Fish Hunting - Interlude!
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One day during the trip, the wife and I went kayaking down one of the mangrove trails in Sanibel. I brought my nets with me, but because it was a protected area I couldn’t go fishing at all. Ah well. Still was a fun time - saw lots of aquatic life.
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Probably the invertebrate I saw the most were these lil guys. These were Mangrove Periwinkles (Littoraria angulifera), a small-ish snail on the order of about an inch long. You’d see these guys everywhere but funny enough I didn’t see any of them moving. Whether they hunker down for the day or only move during brief periods is unknown to me. But I like them all the same.
Come to think of it, I never saw a single shell of theirs on all the beaches I combed. Huh. Not sure why that is.
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While we are on the subject of invertebrates, we’d also see lots of Mangrove Tree Crabs (Aratus pisonii) on the roots and trunks of the trees. Like my local Sesarmid crabs, these guys are fairly shy and aren’t fond of humans, apparently. They’d rather run than fight and the tour guide was able to pluck them from the limbs with no issues. They also like to climb on the oyster reefs that gather on the mangrove roots - just a really cool ecosystem.
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While most people think of red mangroves when somebody mentions a typical “mangrove look” - there are other species as well. Here is a Black Mangrove (Avicennia germinans) for comparison. Rather than the tiptoe look of the red mangrove roots, these come up from the water line. Based on the tour guide’s information, Black Mangroves expel salt through their leaves whereas the Red Mangrove just excludes the salt from entering at all. I thought both shed salt in the same way. Neat point of info to learn!
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Red Mangroves (Rhizophora mangle) was by far more common than the Black Mangrove, though, which I understand is because they are more salt tolerant, on average. The root systems were impressive to say the least. It was definitely an experience I’d recommend to you guys if you are ever in the area and like kayaking.
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Lastly, a (somewhat blurry) look at how propagules grow on the Red Mangroves. Just kinda neat I think.
Now you may be asking - where are the photos of the fish? Well. I really couldn’t get any. I saw a number of fish species, including Needlefish, Mullets, and Sheepshead, but the most numerous, by far, were... drumroll please... Eastern Mosquitofish! Yes, in the roots, in the shallows, near the docks, Eastern Mosquitofish are everywhere here too.
Some things never change.
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cocoa-kayaking · 4 months
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Travel through the exotic Mangrove Tunnels in Cocoa Beach, Florida with Cocoa Kayaking! You may just see mangrove tree crabs along the way!
Mangrove tree crabs 🦀 also known as aratus pisonii. Their coloration helps them blend into their surroundings on the mangroves. Harmless to humans and a fun hid and seek game amongst the mangroves.
Excellent footage by @roccitymedia @jaredquackenbush
#cocoakayaking #florida #kayakflorida #mangroves #cocoabeach
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platycryptus · 3 years
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The mangrove tree crab (Aratus pisonii) is a small tree-dwelling crab found on coastlines from Florida to South America wherever mangroves grow.
Not only are they acrobatic climbers that spend most of their time in mangroves, they feed mainly on mangrove leaves, and are responsible for 90% of herbivory that occurs in mangrove forests. Nevertheless, like most crabs they’re omnivorous scavengers and will descend from the trees at low tide to feed on carrion and other ocean debris.
I also observed one climbing the trunk of a big oak tree several meters from the nearest source of water.
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lraquel · 3 years
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who lives in a mangrove above the sea?
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THIS GUY
The mangrove tree crab only ventures to the briny mudflats at low tide for noms. Not to be confused with, I kid you not, the similar looking mangrove root crab. I met this crustacean on Sanibel Island Florida in 2019. 
Aratus pisonii
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1minnim · 3 years
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I was thinking to myself and remembered the tree octopus thing (heres the site https://zapatopi.net/treeoctopus/) and went like “hmmm tree octopus? what about tree lobster?” but then i remembered that its a thing. then i decided to look up “tree lobster” to double check. 
what i was expecting was this - the mangrove tree crab (aratus pisonii)
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but instead i got this.
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the actual tree lobster, dryococelus australius guess what? it lives in Australia
its actually threatened and was believed to be extinct
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danielmaass · 3 years
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3. Cangrejo del árbol manglar (Aratus pisonii)
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manimirandas · 5 years
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pequeño Cangrejo Arbóreo de los manglares ( Aratus pisonii) , mide próximamente 2cm. Se alimenta principalmente de la epidermis de las hojas del manglar. (en Santuario Nacional Los Manglares De Tumbes) https://www.instagram.com/p/BsYebxJH__I/?utm_source=ig_tumblr_share&igshid=1wu4mc8rw794v
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aududan-blog · 7 years
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Date: 2/3/2017
Name: Daniel Rico-Madrazo
Class: IDS-H Audubon
Instructors: Professor Lemeh & Dr. Moore
Blog entry # 3
Word Count: 322
Location:Coral Cove Park
Time of Day 0835-1030
Weather: Cool, slight sea breeze, then sunny as time passed.
Materials:
Pilot Hi-Tec 3mm ballpoint Pen
Species Observed :
Coquina (not quite a living thing, but it acts as a habitat for many creatures) sedimentary rock
Mangrove Tree Crab (Aratus pisonii) aprox 2 inches in diameter
Red Mangrove (Rhizophora mangle) New shoots pictured est 1-2 feet tall, parent tree 16 ft
Sea Urchins (unidentified) aprox 1 in in diamater
Discussion
Upon arriving at Coral Cove at 8:35 in the morning, Dr. Moore began to teach about three separate habitat types in the area. The area most inland was the Mangrove Forest, which contained red, white, and black mangroves, and mangrove tree crabs. Also, in the wading pools there are many conch shells and hermit crabs. Then crossing the road, moving closer to the shoreline we entered the Maritime Forest, which contains coconut palms, sea grapes, cacti, and buttonwood. These plants are hardy to the salt spray, but not invulnerable to it, as Dr. Moore pointed out, indicating how the sea grapes grew on a slope, because at a certain height the salt spray would kill new growth. Finally we arrived at the Primary Dunes, the vegetation of which consisted mostly of sea oats. After, lecturing us about each habitat, Dr. Moore let us loose to find subjects. I immediately went to the shore to explore the Coquina rock structures, hoping to find a large diversity of life growing within the interesting and intricately shaped rocks. I recorder many photographic images of different rock structures and the life located on and in them, but eventually I wound up back in the Mangrove forest to take more pictures of the mangrove tree crab. Eventually I returned to the shore, to collect more images, and finally did a quick sketch of a Coquina structure at around 10:04 am. We regrouped, and left at 10:30 am.
I will be including the rest of the images in subsequent blog posts.
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vagebonden · 7 years
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We discovered an interesting species in the Mangroves at Caleta Lobos.  I never ever saw something like this before; therefore pretty hard to identify; it looked like a crab, it moved like a spider, it attached to the branches like bats, it had eyes like a shrimp and it was as fast as a cockroach. But a-ha, it had eight legs. Back in the world with internet, we seeked out this little creature.  Apparently it’s the Mangrove Tree Crab (or Aratus Pisonii - the name commemorates the Dutch naturalist Willem Piso). 
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phostracks · 8 years
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The Mangrove Tree Crab (Aratus pisonii), 28 November 2015
The Mangrove Tree Crab (Aratus pisonii), 28 November 2015
Aratus pisonii, the Mangrove tree crab Everglades National Park area in Miami-Dade county, Florida 28 November 2015, Nikon D7100 Turkey Break BioBlitz 2015
If you spend some time exploring Florida’s mangroves (which can be a rather challenging experience), you might catch a glimpse of something scampering about the foliage. You’ll likely first see it in your peripheral vision —a slight aberration…
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astronomy-to-zoology · 10 years
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Mangrove Tree Crab (Aratus pisonii)
...a species of semi-terrestrial Sesarmid crab which inhabits mangrove trees in tropical and subtropical parts of the Americas, ranging from Florida to Brazil and Nicaragua to Peru. A. pisonii typically inhabits red mangroves (Rhizophora mangle) but is known to inhabit white and black mangroves as well, it will ascend to these trees when the tide rises and descend to the mud when the tide goes down. 
Mangrove tree crabs feed mostly on the leaves of the mangrove trees they inhabit. However, they are omnivores and will prefer animal matter if possible, typically feeding on small invertebrates and carrion.
Classification
Animalia-Arthropoda-Crustacea-Malacostraca-Decapoda-Brachyura-Sesarmidae-Aratus-A. pisonii
Images: Fabio Mandredini and kaeagles
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