It sounds like it is a Camel Shrimp not a peppermint. Check these to determine which.
Camel
http://www.google.com/imgres?imgurl=http://www.petshop-zoomania.com/Shrimps,Snails,Creatures/Camel%2520Shrimps.jpg&imgrefurl=http://www.rainbowfish.info/forum/viewtopic.php%3Ff%3D18%26t%3D743&h=768&w=1024&sz=294&tbnid=A1XSREDUlNAEFM:&tbnh=90&tbnw=120&zoom=1&docid=QJMs4wEONopa9M&hl=en&sa=X&ei=nTaHT_DtHsjx0gGSspTqBw&sqi=2&ved=0CEoQ9QEwAg&dur=2511">http://www.google.com/imgres?imgurl=http://www.petshop-zoomania.com/Shrimps,Snails,Creatures/Camel%2520Shrimps.jpg&imgrefurl=http://www.rainbowfish.info/forum/viewtopic.php%3Ff%3D18%26t%3D743&h=768&w=1024&sz=294&tbnid=A1XSREDUlNAEFM:&tbnh=90&tbnw=120&zoom=1&docid=QJMs4wEONopa9M&hl=en&sa=X&ei=nTaHT_DtHsjx0gGSspTqBw&sqi=2&ved=0CEoQ9QEwAg&dur=2511</a>
Peppermint
[IMG]http://www.google.com/imgres?imgurl=http://www.bluezooaquatics.com/images/products/Invertebrates/large/Peppermint_Shrimp_ps.jpg&imgrefurl=http://www.bluezooaquatics.com/productDetail.asp%3Fpid%3D1220%26cid%3D84%26did%3D2&h=232&w=242&sz=101&tbnid=umbFbrPHvfNwPM:&tbnh=100&tbnw=104&zoom=1&docid=VpDISePvZ-Eb1M&hl=en&sa=X&ei=vDaHT9yRMKb20gGn4KjhBw&sqi=2&ved=0CGIQ9QEwAw&dur=640">http://www.google.com/imgres?imgurl=http://www.bluezooaquatics.com/images/products/Invertebrates/large/Peppermint_Shrimp_ps.jpg&imgrefurl=http://www.bluezooaquatics.com/productDetail.asp%3Fpid%3D1220%26cid%3D84%26did%3D2&h=232&w=242&sz=101&tbnid=umbFbrPHvfNwPM:&tbnh=100&tbnw=104&zoom=1&docid=VpDISePvZ-Eb1M&hl=en&sa=X&ei=vDaHT9yRMKb20gGn4KjhBw&sqi=2&ved=0CGIQ9QEwAw&dur=640</a>