Well, different people call them different things. Some people call them Aqua Jumps, and some people call them Blobs!
Reflection..
A person who hides things may be called sneaky. An urban word for people who hides things may be shady.
NDN can mean many things. The most relevant being Non-Delivery Notification. This is a bounced e-mail. An e-mail that cannot reach the contact but has actually been sent back to the sender. This is also called a bounced e-mail.
a hoarder
A miner.
scientist
Arch
What is a person called when they search for rare things?
Crazy people can be many of things. Crazy people can be someone that is outspoken, loud, someone who does not care and that does not think straight.
You can be called forgetful, or an amnesiac (someone who has amnesia, which is memory loss) Oblivious.
independent
appraisers