In the demo for the island, players could look around through the viewfinder overlooking the Loch. Some would see a shadowy shape of Nessie, and win Cryptids costume items.
(see related blog link)
The prize for spotting Nessie during the Cryptids Island preview (beginning December 2, 2010) was a Nessie Hat.
The prize for spotting Nessie during the Cryptids Island preview (beginning December 2, 2010) was a Nessie Hat. (see related link)
If your avatar was on the island for the Preview, you have to leave and come back to play the island.
(The preview was only available from December 2 to December 19, 2010.) On the Cryptids Island preview in Poptropica, visitors had a chance to spot Nessie for a prize. She appeared as a small shape in the distance. Seeing her was mostly random chance, but the odds could be improved by multiple visits over the period of the preview.
The prize for seeing Nessie on the Cryptids Island Preview was a Nessie hat.
During the special preview of Cryptids Island (beginning December 2, 2010), anyone who spotted Nessie got a special Nessie hat. However, you could not always see Nessie, and when you did she was a distant shape on the loch. (see related link)
The prize for spotting Nessie during the Cryptids Island preview (beginning December 2, 2010) was a Nessie Hat or other various costume prizes, from the Nessie follower to the Bigfoot costume hat. (Nothing but "virtual" prizes for your avatar.) (see related link)
The Scottish Terrier nicknamed "Sparky" appears in the viewfinder (binocular telescope) at Loch Ness. If you clicked on him during the Preview, he would bark at you. He is not part of the Cryptids island quest.
The name of the Poptropica island is "Cryptids Island." (see related question)
There are animals on many Poptropica islands. There is a Safari on Nabooti Island, cryptids on Cryptids Island, and in several quests. See the related questions.
There is no Nessy Island. The name of the quest is Cryptids Island. (see related question)
You don't get immortality, even on Mythology Island. Collect evidence at the four locations (and later a fifth) to prove the existence of the 4 cryptids on Cryptids Island. (see the related solution) (see the video links below)