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Unit 3, Lesson 3: Vocab Crossword

Across
Grow a backbone!
Over 11,000 species of aquatic animals found both in freshwater and marine environments, including jellyfish, hydroids, sea anemone, corals and some of the smallest marine parasites.
Arthropods are a very diverse group of organisms that includes insects, crabs, lobsters, scorpions, and centipedes.
A single-celled organism with two flagella,
An immeasurably deep gulf or great space.
This zone is also known as the Twilight Zone.
These known as the segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches.
Also known as the open ocean, is the area of the ocean outside of coastal areas.
Down
Sponge Bob (These organisms have pores and are dynamic and diverse)
The uppermost layer of a body of water that receives sunlight, allowing phytoplankton to perform photosynthesis.
Organisms in this phylum all have two major defining characteristics that set them apart from all other animals: a water vascular system and five-sided radial symmetry.
The deepest region of the ocean
The second-largest phylum of invertebrate animals, after Arthropoda; members are known as molluscs or mollusks. Around 76,000 extant species of molluscs are recognized.
A hard stony substance secreted by certain marine coelenterates as an external skeleton, typically forming large reefs in warm seas.
A solitary or colonial sedentary form of a coelenterate such as a sea anemone, typically having a columnar body with the mouth uppermost surrounded by a ring of tentacles.