
1) American monster movie 2) American young adult novel 3) Flexible feelers 4) Octopuses have many 5) Reach, metaphorically 6) Spots for suckers 7) Underwater arms
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https://www.crosswordclues.com/clue/tentacles

1) Arms
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https://www.crosswordclues.com/clue/tentacles

Appendages that are flexible, because they have no rigid skeleton. Cnidarians and molluscs are two kinds of organisms that may have tentacles.
Found on
http://www.daviddarling.info/encyclopedia/T/tentacles.html

Appendages which are flexible, because they have no rigid skeleton. Cnidarians and molluscs are two kinds of orgnaisms which may have tentacles.
Found on
http://www.ucmp.berkeley.edu/glossary/gloss7metazoa.html

Appendages which are flexible, because they have no rigid skeleton. Cnidarians and molluscs are two kinds of orgnaisms which may have tentacles.
Found on
http://www.ucmp.berkeley.edu/glossary/glossary_7.html

tentacles Long, thin, armlike parts of some sea animals, which are used for feeling and holding things, catching food, or moving around; such as, the octopus and jellyfish.
Found on
http://www.wordinfo.info/words/index/info/view_unit/2110/

arms of an animal, usually invertebrate, such as an octopus
Found on
https://sciencetrek.org/sciencetrek/topics/predators/glossary.cfm
No exact match found.