Crabbalishious
Parasitic Peril
History & Stumpers
Pelagic Party
Benthic Boobari
100
Which of these is not a true crab?
A) Soilder Crab
B) Blue Crab
C) Yeti Crab
C) What are Yeti Crabs
Yeti Crabs are of the Infraorder Anomura, and have Carcinisized their way up to the crab title
100
Is there a type of Parasitic Barnacle?
What is Y E S!
Disturbingly, female Rhizocephalan barnacles are parasitic. They invade mainly Crabs but also, Lobsters, and the Peracardia (crustaceans with a brood-pouch). These barnacles slowly infest the Crabs insides before the Crab cannot keep molting, (if the Crab is male, the Barnacle will slowly feminize him). Once the Barnacles "roots" are in place, it will expand its sac out of the Crabs abdomen, where they will wait for a male to come and become her testicles which she uses to fertilize her eggs. The Host will take care of this sac as if it were their own, and while infested are in a constant mating mode.
These parasites are not necessarily fatal. Often dying off before the Crab, leaving the Crab heavily scarred and sterile.
https://www.wired.com/2015/07/absurd-creature-of-the-week-rhizocephalan/
100
What Phylum do Crustaceans belong to?
A) Arthropod
B) Echinoderm
C) Annelid
A) What are Arthropods!
Animals which have jointed appendages belong to this phylum. This is the largest phylum in the animal kingdom, containing Insects, Arachnids, and Crustaceans
100
Can some Crabs Swim?
What is Totally!
Crabs of the family Portunidae are well known swimmers! Using their back pereiopod (leg) as a sort of paddle.
100
What do Mantis Shrimp Live in?
A) Tent
B) Among Corals and Kelp
C) Burrow or crevice
C) What is a Burrow or Crevice!
Mantis Shrimp spend most of their time in their Burrow, eating, cleaning, mating, laying/ taking care of their eggs.
200
What is the biggest known crab (common name)?
A) Spider Crabs
B) Coconut Crabs
C) George the Great
"He's a Japanese spider crab who lived at Sea Life in Blackpool, UK. Big Daddy's legs stretched to 3.11 metres (10 feet 2.5 inches) making him the world's widest crustacean living in captivity,” Guinness World Records
A) What is the Japanese spider crab!
The Japanese spider crab, is capable of achieving a leg span of more than 13 feet (4 meters) across (leg to leg).
Fun Facts, this crab’s carapace stays the same size once it becomes an adult, but the legs keep growing.
Coconut crabs are the biggest Land Crabs, and the crab George the Great only exists in our hearts
200
Where do Parasitic Isopods typically live on fish?
A) Mouth
B) Gills
C) Eyes
A) What is the Mouth!
Parasitic Isopods typically takes residence in the Fishes mouth to feed on mucus, tissue, and detritus.
200
Are Limpets Crustaceans?
What is No!
Limpets are Mollusks! Aka, a type of snail!
200
Are Sulfide Shrimp (Tethysbaena) Benthic or Pelagic?
What is kinda Pelagic...
Tethysbaena are Lenthic critters, meaning they live in still fresh water. This Family is known to swim/ float beneath the bacterial mat on the waters surface.
200
How are Lobsters caught?
A) Seafloor with crates/ pots
B) Jimmy and his grappling arm
C) Spearfishing on the open sea
A) What is the Seafloor with crates/ pots!
Lobster fishing or Lobstering, is dropping traps/ creates/ pots into the sea and leaving them "soak" and fill up with hungry Lobsters before going back and collecting them, before repeating the cycle.
300
Are there any toxic Crabs? (to consume)
What is Yes!
Crabs of the Family Xanthidae are typically toxic to eat, containing a similar toxin to Pufferfish (Tetrodotoxin) and can cause Paralytic Shellfish Poisoning which is deadly.
They are common to coastal shores, and are typically nocturnal.
If its colorful in the ocean DO NOT PUT IT IN YOUR MOUTH (leave it be)
300
Which type of Parasite are commonly found on Greenland sharks?
A) Barnacles
B) Isopods
C) Copepods
C) What are Copepods
Ommatokoita elongata are 30 mm long pinkish-white parasitic copepods, frequently found permanently attached to the corneas. Slowly scrapping the corneas do cause them to go blind, but the Greenland sharks keen sense of smell largely makes up for this disability.
Although Barnacels are rarely found on Greenland sharks, they are not considered Parasitic, but Copepods on the other hand are very commonly found on the eyes of Greenland sharks.
300
When is the earliest evidence of Crabs?
A) Jurassic
B) Triassic
C) Cretaceous
What is A!
Crabs first appear in the fossil record early in the Jurassic period of the Mesozoic, nearly 200 million years ago!
Cretapsara athanata, the oldest modern-looking crab discovered (approximately 100 million years old) and the most complete fossil crab ever discovered. (there are older fossils from the Jurassic (Eocarcinus), but this is easier to look at)
300
Which creature cannot move in adulthood, but free living in their larval stage?
A) Barnacles
B) Mysids
C) Slipper Lobsters
A) What are Barnacles!
Unlike Limpets (a type of mollusk), barnacles are stuck where they choose to anchor themselves, but free swimming as larvae
300
Which of these Orders spends the most time on the Ocean Floor?
A) Opossum Shrimp
B) Amphionids
C) Krill
A) What is Opossum Shrimp (Mysids)
400
What is the smallest type of Crab known?
A) Sand Bubbler Crab
B) Pea Crab
C) Fiddler Crab
B) What is the Pea Crab
Females are bigger, around the size of a pea (roughly 13mm).
Pinnotheres pisum, in the family Pinnotheridae. Pea Crabs are tiny parasitic crabs that typically live in bivalves (such as oysters and mussels) but are also commonly found in fish, and urchins. They are safe to eat.
400
Are Crabs; as in Pubic Lice, really a Crab?
What is No.
Pubic Lice, are a type of insect, of the order Psocodea (Barklice, Booklice, and Parasitic Lice). They differ from traditional lice by having a shorter and rounder body.
400
Which of these do not belong to the Malacostraca?
A) Krill
B) Sand Flea
C) Copepods
B) What are Copepods
Copepods belong to the Order Maxillopoda, who commonly have shortened bodies, with a reduced abdomen that typically lacks appendages (ie, pereiopods or pleopods). Copepods share the order with Branchiura, Barnacles, and many other parasites and small crustaceans.
400
What is the development stage all crustaceans go through?
A) Veliger larva
B) Nauplius larva
C) Bluteus Larva
B) What is Nauplius Larva
All crustaceans go through the Nauplius stage, lest they be free swimming or embryonically
Veligers become snails, Bluteus become Urchins
400
Are Amphipods (Hyperiids) typically Benthic?
What is No,
Hyperlid Amphipods are entirely planktonic, meaning they spend most of their time in the water column.
The sub-Order Gammaridea contains more epibenthic Amphipods.
500
Which Infraorder is that of True Crabs?
A) Anomura
B) Brachyura
B) What is Brachyura?
The crab abdomen (corresponding to what gourmets call the "tail" of a lobster) is reduced to a thin, flat plate, tucked forward out of sight below the cephalothorax, hence the name "Brachyura," or "short-tailed" crabs.
500
Do any Parasitic Crustaceans affect People?
What is Yes...
Tongue Worms, Subclass Pentastomida. Adult tongue worms vary from about 1 to 14 cm (0.4 to 5.5 in) in length, but parasitise during the larval stage in a illness called Pentastomiasis; in which the eggs are consumed and hatch in the intestines, and typically make their way to the liver were they form tumor like cysts and typically die within 2 years, although rarely they hatch and further invade the body.
They are mainly found in Africa, and south east Asia. Typically gotten from eating snakes, but also, dogs, and foxes.
Although they are called Worms and share several features with worms, their genes and mite-like-features suggest they are Crustaceans or at the very least Arthropods.
500
Are Mysid Shrimp Shrimp (a member of Caridea)?
What is No
The entire Order of Mysidacea is heavily debated, once containing Lophogastrida, Stygiomysida and Mysida, as well as Euphausiacea (krill) known as Schizopoda, although the group was split up in 1904.
500
What creature do Phronima Amphipods typically live in and eventually consume?
A) Soft Corals
B) Sea Angels
C) Salps
C) What is a Salp
These Amphipods use their pincer-like legs to cling to the gelatinous bodies of the Salp. After consuming the innards of a Salp they will bury its body into the vacated space and lay their eggs.
500
What type of Crustacean is Dulcibella camanchaca?
A) Amphipod
B) Caridia (Shrimp)
C) Stomatopod (Mantis Shrimp)
A) What are Amphipods!
Measuring just under 4 centimetres, Dulcibella camanchaca exhibits unique features, such as raptorial like appendages (gnathopods), used for hunting smaller organisms, including other amphipods.
This crustacean is found in a stretch of the Atacama Trench, where depths slightly exceed 8,000 metres. Four Dulcibella camanchaca individuals were collected at a depth of 7,902 metres.