Was collecting shells at the beach and somehow I aquired a little crab and what looks like a conch.. before I attempt to do amything other than put them back from whence they came what might they be and are they reef safe..I have a 5 gallon tank with a hermite, tricolor anemone and some zoas... live rock and live sand....the crab is .75 inches across and the "conch" is about 3 inches... thank you in advance



