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Q u o t e:
Nice. I'm going to have a sweet weekend.



Arthropods generally lay eggs. If you mean how do the eggs get fertilized, the same way they usually do. One catch with big crustaceans is that they can only mate following a molt. Males of some crabs will literally keep a claw on a female who is about to molt until she' sheds her skin. Molted crabs are soft, which is where softshell crabs come from. However because their mouthparts are also soft, they don't eat for awhile following a molt. This can make them difficult to catch say blue crabs (Callinectes spp.)through conventional methods, which use bait. Many crustaceans carry the eggs until they hatch. Larval crustaceans are very small and are carried through the water column as plankton. Insects by contrast tend to have a mobile adult form and a relatively immobile larval form (think butterfly v. caterpillar). Crustaceans have a mobile larva and adults that don't travel great distances (or in the case of barnacles, not at all).

This oceanographic moment has been brought to you by Blizzard Entertainment.

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Q u o t e:
Nice. I'm going to have a sweet weekend.



Arthropods generally lay eggs. If you mean how do the eggs get fertilized, the same way they usually do. One catch with big crustaceans is that they can only mate following a molt. Males of some crabs will literally keep a claw on a female who is about to molt until she' sheds her skin. Molted crabs are soft, which is where softshell crabs come from. However because their mouthparts are also soft, they don't eat for awhile following a molt. This can make them difficult to catch say blue crabs (Callinectes spp.)through conventional methods, which use bait. Many crustaceans carry the eggs until they hatch. Larval crustaceans are very small and are carried through the water column as plankton. Insects by contrast tend to have a mobile adult form and a relatively immobile larval form (think butterfly v. caterpillar). Crustaceans have a mobile larva and adults that don't travel great distances (or in the case of barnacles, not at all).

This oceanographic moment has been brought to you by Blizzard Entertainment.

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Q u o t e:
Arthropods generally lay eggs. If you mean how do the eggs get fertilized, the same way they usually do. One catch with big crustaceans is that they can only mate following a molt. Males of some crabs will literally keep a claw on a female who is about to molt until she' sheds her skin. Molted crabs are soft, which is where softshell crabs come from. However because their mouthparts are also soft, they don't eat for awhile following a molt. This can make them difficult to catch say blue crabs (Callinectes spp.)through conventional methods, which use bait. Many crustaceans carry the eggs until they hatch. Larval crustaceans are very small and are carried through the water column as plankton. Insects by contrast tend to have a mobile adult form and a relatively immobile larval form (think butterfly v. caterpillar). Crustaceans have a mobile larva and adults that don't travel great distances (or in the case of barnacles, not at all).

This oceanographic moment has been brought to you by Blizzard Entertainment.

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Q u o t e:
marine biology is useful info imo.

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Q u o t e:


There are more types of Arthropods that any other multicellular lifeform, so the taxonomy gets pretty complex. For example, there are probably 300,000 species of beetles. There may be 50,000 species of crustaceans, but crustaceans are vastly understudied compared to insects -- something to do with the difficulty of sampling. :)

Phylum Arthropoda (armored things)
--Subphylum Crustacea (double legs)
----Class Malacostraca (antennae, mouthparts, head and thorax)
------Order Decapoda (10 legs)
--------Crabs, shrimp and lobsters are in this group.



True enough. They aren't as planktonic (generally at the whim of water currents) as most baby crustaceans though. Interestingly (to me anyway) freshwater crustaceans like crayfish also skip over the planktonic larva. It doesn't work well for stream-dwelling critters. :)



It is called the hepatopancreas, and is a digestive organ that does some of the same functions as a vertebrate liver. It only looks that bad because you're usually looking at the cooked version. Some people like the taste. It isn't typically dangerous, but can accumulate contaminants depending on where the crab lives. Unless you eat crabs every week, it's probably not an issue.

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Q u o t e:
Nice. I'm going to have a sweet weekend.



Arthropods generally lay eggs. If you mean how do the eggs get fertilized, the same way they usually do. One catch with big crustaceans is that they can only mate following a molt. Males of some crabs will literally keep a claw on a female who is about to molt until she' sheds her skin. Molted crabs are soft, which is where softshell crabs come from. However because their mouthparts are also soft, they don't eat for awhile following a molt. This can make them difficult to catch say blue crabs (Callinectes spp.)through conventional methods, which use bait. Many crustaceans carry the eggs until they hatch. Larval crustaceans are very small and are carried through the water column as plankton. Insects by contrast tend to have a mobile adult form and a relatively immobile larval form (think butterfly v. caterpillar). Crustaceans have a mobile larva and adults that don't travel great distances (or in the case of barnacles, not at all).

This oceanographic moment has been brought to you by Blizzard Entertainment.

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Q u o t e:
Whenever a thread needs comic relief from now on we should just get GC to come in and answer some marine biology questions.

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