Giant Antarctic Sea Spiders | SciShow Talk Show | Summary and Q&A

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August 1, 2018
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Giant Antarctic Sea Spiders | SciShow Talk Show

TL;DR

Sea spiders and tarantulas are fascinating creatures with unique anatomy and behaviors that have evolved over millions of years.

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Questions & Answers

Q: What are sea spiders and where are they usually found?

Sea spiders are marine arthropods that live in tidal areas and on the continental shelf, feeding on soft-bodied animals. They are often found hiding in algae or underwater plants.

Q: How are sea spiders different from land spiders like tarantulas?

Sea spiders are more closely related to mites and scorpions than to land spiders. They have a longer body structure and unique adaptations for living in water.

Q: Why do sea spiders have their organs in their legs?

Sea spiders have evolved to have most of their organs located in their long legs. This allows for efficient circulation of fluids in their bodies, as their hearts are too weak to pump them effectively.

Q: Are tarantulas dangerous to humans?

While tarantulas are venomous, most species are not dangerous to humans. Their bites are comparable to a bee sting and are usually only harmful to people with allergies.

Q: What are some theories on why sea spiders can grow to be so large?

One theory is that the cold waters of the polar regions, where many sea spiders are found, allow for slower metabolic rates and larger body sizes. Another theory suggests that the high oxygen levels in these waters promote the evolution of larger structures.

Q: How do tarantulas molt?

Tarantulas molt in order to grow larger. They shed their old exoskeleton and form a new one that fits their increased size.

Q: How old can tarantulas live?

The lifespan of tarantulas varies depending on the species, but some can live for up to 20 years or even longer in captivity.

Summary & Key Takeaways

  • Sea spiders are marine arthropods that are often found hiding in algae and preying on soft-bodied animals. They have long legs and unique digestive and circulatory systems.

  • Tarantulas, on the other hand, are land-dwelling spiders with fuzzy bodies and specialized mouthparts. They use their legs for sensing and catching prey.

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