ink gland is a feature of which phylum?

Ink gland is present in some squids of phylum MOLLUSCA for offence and defence. When the squid is attached, it emits a cloud of inky fluid through its siphon. This SMOKE SCREEN interferes with the visual and chemoreceptor of the predators and thereby helps squid to escape. Ex: Loligo, octopus,sepia ,etc
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