We have a woman friend who is snake phobic.
The only snakes we have found that come onto boats are sea snakes, and their venom apparatus is way back in their throats, and they are relatively small snakes, not huge, like pythons. I don't think I've ever seen one over 2" diameter, about 6 feet long. This snake would have to bite you on an appendage, he is unable to fang you like a rattlesnake or copperhead. They are air breathers and eat tiny stuff. The ones in New Caledonia
are generally under 3 ft. long, and correspondingly smaller diameter. Although their venom is very strong, they really are little danger
to humans, because it's hard for them to bite you. In addition, they are generally quite docile, non-aggressive snakes, actually rather elegant in their pale blue and black attire.
In the case of the woman above, mr. snake had come into their boat and curled up in the sink. The local maths teacher, who lived aboard there, came over to their boat, and gently removed the snake and it swam away.
In another case, I made a sea snake toy, filled it with beach sand, and gave it to a snake phobic friend and suggested she "fool around" placing the snake different spots in the boat. She found a lot of creative places for him to lurk, and eventually, her phobic reactions milded down, through a process I believe is called "desensitization". If you make a small copy of the type of the local snake, it's just a cylinder with a tapered head
, fill him with beach sand, let her name it, and play with it--as therapy--she's a smart lady--it may help.
It is good to be aware of snakes, but the phobia can be helped, sometimes the sufferer had a traumatic incident in their childhood that triggered the reaction. But in the case of my friend, we never needed to go there, just having symbolic control was enough to allow her to let the extreme fear go.
Good luck to your wife, sir, in her recovery.