MOSCOW, April 10. /TASS/ State construction managers have been ordered to ensure year-end completion of a massive Russian project to build one of the world's largest oceanarium - to a deadline set by President Vladimir Putin.

Russian Far East's Vladivostok is the site for a giant 30,000 square meter fish tank - proposed home for a planned 15,000-18,000 marine species and up to 600 living organisms found in the planet's seas, Russia's Amur river and Lakes Baikal and Khanka.

Maritime Oceanarium is a project of Putin's own making, at a site he's visited more than once and last seeing it back in November.

But it's been taking too long for the scientific-educational center to rise from the ground on finance guaranteed by Russian lender Sberbank, bemoaned the leader.

A managing contractor deemed tardy and asking for more money has been fired from the location on Russky Island and a planned opening date postponed.

But Putin now has the job under his personal control and has ordered the Presidential Property Management Department to make up the slack in the biggest project of its kind in Russia, department spokesman Viktor Khrekov told TASS.