To dream of a turtle represents emotional lock-down or a desire for safety that overrides all else. You don't want to do anything except deal with a specific problem until the threat is gone. A wish for perfect safety. Not caring about anyone else at all if you are threatened.
A turtle may reflect dangerous situations or very sensitive issues that want to do everything you can to avoid. A turtle may also be a sign that you are afraid to reach out or that you're "building a wall" around your life in some way.
Turtles have a tendency to show up in the dreams of very sick people or those facing death. This is because their health problem is so dangerous that they feel the need to isolate themselves from anything that could compromise their sensitive state. The turtle's tendency to hide in their shell then reflects concern for their problems at the expense of all else.
Example: A young man dreamed of seeing a turtle. In waking life he making threats to kill himself if he didn't get his way from someone.
Example 2: A woman dreamed of being in the ocean surrounded by a bunch of turtles. In waking life she was heavily pregnant and sensitive about taking a single risk at all until the baby was born.
To dream of a sea turtle represents an aspect of yourself that doesn't want interference at all. Not wanting anyone getting in your way, telling you that you're wrong, or stopping you from completely having your way.
Example: A man dreamed of seeing an injured sea turtle. In waking life he was a spiritual lecturer that made a claim about the future that embarrassed him. The injured sea turtle represented the man's wish to always be respected while leading others that was compromised because people kept reminding him of his miscalculation about the future.
To dream of a snapping turtle represents behavior that is aggressive about doing nothing at all for other people. People in your life that are both mean and selfishly withholding from you. "Snapping" at other who don't choose to leave you alone. You or someone else that is behaves like they don't like other people at all. Fear or terror being caught lying to parents or authority figures.
Alternatively, a snapping turtle may reflect your own tendency to get aggressive or "snap" at people who test your boundaries. Scaring other people that you don't like them or aggressively pushing people away. Scaring other people that you would choose to never ever think about them mattering.
Negatively, a snapping turtle may reflect desperate angry jealousy. Telling someone to "fuck off forever" or threatening them if you don't get your way.
A person who is cranky about changing, sharing, or co-operating.