Ranitidine is a competitive, reversible inhibitor of the action of histamine at the histamine H2-receptors, including receptors on the gastric cells. Ranitidine does not lower serum Ca++ in hypercalcemic states. Ranitidine is not an anticholinergic agent.
1 The Blue Marlins have a diet of: Octopi, squid and pelagic fish such as black fin tuna and frigate mackerel.  They do prefer to hunt alone and during the day, rather than in schools, so it is safe to say they are a rather antisocial species.
Let's face it, Blue Crabs are scavengers. They will eat anything in front of them. There's always a debate if you ask crabbers what is the best bait for crabbing. Everyone has their opinion, from bull lips, cut up fish, eels, etc.