Isn't it easier to fight the monster on land than under water? No risk of drowning, easily visible target, and you have tanks and choppers to back you up. Also, this time, it has no tentacles to worry about. Just bring in some RPGs or grenades and that thing's toasted. I predict a bunch of people would be eaten by the second one. Also, that high level cop should be sacked for his ego. I know it's for the plot, but to completely disregard Torishima's report and eye witness statement like that is highly irresponsible and lazy. Sack the moron and promote Torishima.