To see a squid in your dream suggests that you are feeling subconsciously threatened. Your judgment may also be clouded. Perhaps you are not seeing things too clearly at the moment. Alternatively, a squid symbolises greed. You go after what you want without any regard for others.
To dream that you are eating squid indicates that you are feeling self-conscious and worrying about how others perceive you. You may be find it easier to isolate yourself instead of risking judgment from others.