Mako Mermaids and H2O Just Add Water Fansite:
http://www.makoislandsite.com/

Two other members of the Mako mermaid pod set out to take away Zac's merman powers so that the pod may return home, but they don't realise his connection to Mako Island may not be accidental. The ruins of an ancient merman temple are discovered by Zac; while only he sees the ruins at first, they can be seen by all during a full moon. Another merman arrives intent on taking Mako Island's power for himself.

Series two introduces three new characters: mermaids Ondina and Mimmi, played by Isabel Durant and Allie Bertram, and merman Erik, played by Alex Cubis. Series two will feature 26 half-hour episodes, and will premiere on 13 February 2015 on Netflix in North America, the United Kingdom, and other territories.