Yes, he has some limited underwater vision.
This is made clear by a quote in The Last Olympian:
Beyond this, the sea floor stretched into gloom. I could see battles raging—flashes of energy, explosions, the glint of armies clashing. A regular human would've found it too dark to see. Heck, a regular human would've been crushed by the pressure and frozen by ...
I recommend reading chronologically
Chronological order is usually the best way to avoid spoilers (except in books with lots of time travel, or where characters can see the future…which come to think of it does apply here). This isn’t strictly chronological, though: for some books, it doesn’t make much difference if you read them slightly out of order.
According to Rick Riordan's faq page:
Q: If two demigods had a child, would that child be a quarter-blood, a demigod, or what?
A: Most half-bloods at Camp Half-Blood don’t live long enough to have children. Their lives are simply too dangerous. If they did have children, the kids would probably pass for normal mortals, since the godly powers get diluted ...
Demigods don't have their full powers until they're acknowledged by their parents.
The problem here is that when adapting the film from the books, they (sadly) cut a few important things, including explaining why Percy wasn't able to heal himself with water before this point and why he didn't know about his other abilities earlier.
The short answer is that ...
In a word, magic
The Lotus Casino is based on the Isle of the Lotus-Eaters from the Odyssey. As such, its main effect is to render those who stay there in an altered state of consciousness and unwilling to leave:
Nine whole days
I was borne along by rough, deadly winds
on the fish-infested sea. Then on the tenth
our squadron reached the land of ...
Percy considers himself safe because horses are Poseidon's domain.
From The Sea of Monsters novel (emphasis mine):
Being the son of the sea god, I never liked going into the air. My dad had this rivalry with Zeus, so I tried to stay out of the lord of the sky's domain as much as possible. But riding a winged horse felt different. It didn't make me nearly ...
According to the source novels, Percy was indeed receiving counselling for his ADHD prior to learning about his godly powers.
I have moments like that a lot, when my brain falls asleep or
something, and the next thing I know I’ve missed something, as if a
puzzle piece fell out of the universe and left me staring at the blank
place behind it. The ...
From the Riordan wiki entry for ADHD
Most demigods are labeled as suffering from ADHD, but it is actually a sign of their heightened senses and natural aptitude for battle. ADHD also gives demigods greater battlefield reflexes and the ability to see where their opponents will strike due to the tensing of their muscles. It is usually coupled with dyslexia ...
If you read the promise carefully there is one major flaw in the gift requested by Percy, which was used by the Gods to bail out: There was no time line set for pardoning the Titans like Calypso.
Percy wanted all demigods to be claimed before they turn 13 and Gods kept their promise.
“Very well!” Zeus growled. “In the name of the Council, we swear by the ...
Ans: A demigod.
Rationale: The word demigod does not mean what is currently the supposition of a being who is "half" god and "half" man. (Unless you are referring to the writer of the Percy Jackson novels, then that is EXACTLY what he means. Anything less than that is likely to be mortal.)
In ancient times:
A demigod (or demi-god) is a ...
Frederick Chase, Annabeth's father had created bullets with celestial bronze casings.
Her father blushed. "Well, not bad for a middle-aged mortal, I suppose." "But the celestial bronze bullets! How did you get those?"
"Ah, well. You did leave quite a few half-blood weapons in your room in Virginia, the last time you... left."
Annabeth looked ...
I would read the main books by order of release so:
The Lightning Thief
The Sea of Monsters
The Titan's Curse
The Battle of the Labyrinth
The Last Olympian
Percy Jackson and the Stolen Chariot
Percy Jackson and the Bronze Dragon
Percy Jackson and the Sword of Hades
The Lost Hero
The Red Pyramid
The Son of Neptune
The Diary of Luke Castellan
I think it is partly as in @Adamant's comment in that Poseidon is shown as a nicer god. Zeus is shown as immensely proud and quite quick to anger. This means he dislikes Percy Jackson flying as an infringement on his territory. Hades trying them was more that he thought they had taken the Helm of invisibility rather than Percy being Poseidon's son. Poseidon ...
Originally announced by Rick Riordan at his event for the release of Magnus Chase and the Gods of Asgard, all of the major characters from Percy Jackson and the Olympians and The Heroes of Olympus will be revisited - including Leo.
And, in The Trials of Apollo, he does come back - and people set up a ticket line for people to punch him.
It is indeed very dangerous for Percy to fly
The danger in taking a plane is that Percy would be in the domain of Zeus, who has dominion over the sky. Due to how much Zeus dislikes Poseidon, Percy would be in serious danger:
“Oh,” I said. “Naturally. So we just get on a plane-”
shrieked. “Percy, what are you thinking? Have you ever ...
It does suggest that Pluto (and maybe Hades) has a jollier side as most children reflect their parents (Aphrodite's children are vain and/or caring, Athena's are arrogant, etc.). Now in theory Hazel's cheeriness could come from her mother but from what we see of Marie Levesque this seems unlikely. Maybe she was cheerier before the curse but I doubt it. ...
Grover wears Styrofoam foot shapes over his feet, and then shoes and socks over them. His feet don't get eaten by worms for the same reason that you don't get hangworms - shoes and socks.
"I'm sorry," Grover sniffled "I'm a failure. I'm—I'm the worst satyr in the world."
He moaned, stomping his foot so hard it came off. I mean, the Converse hi-top ...
The Lotus Casino only prevents the passage of time for those inside it. Outside, time is still passing at the normal rate. Therefore, Percy's birthday would still be on the same date regardless.
For instance, if Percy had stayed inside the casino for 100 years, he would still be 100 years older when he comes out - he just wouldn't have aged 100 years. ...
It's not explained very clearly in the book (Mark of Athena is where the concept is introduced, and the other 2 books of Heroes of Olympus simply reinforce the idea that it's super dangerous AND forbidden by Roman camp laws):
Reyna plucked an apple from a passing fruit tray. She turned it in her fingers, studying the dark red surface. “You propose an ...
There's VERY little canon information to go off of:
The average total lifespan seems to be very small due to majority of demigods (especially Greek from Camp Half-Blood) being killed off early in life:
“You—you’re a half-blood?” I didn’t mean to sound so surprised, but I’d never seen an old demigod before.
Quintus chuckled. “Some of us do survive into ...
The films are wildly inconsistent from the books but according to the books the only thing stopping bad stuff entering is Thalia's spirit trapped in a pine tree. I assume Thalia doesn't have the strength to stop a god. Furthermore half bloods can allow over creatures to enter. Chiron mentions it in book 1 and Anabeth demonstrates it in book two allowing ...
Just a theory, I could be completely off target here. In the books there are two instance when Riptide does not return back to Percy Jackson.
No Pocket, No Pen:
The sword returns back to Percy's pocket and not him.
“I reached for Riptide, which I always kept in my pocket, but then I realized I was wearing gym shorts. I had no pockets. Riptide was tucked in ...
Poseidon was considered to be the god of the sea, the massive, dangerous, deep body of water; not the god of fluids. It is more of the concept of the ocean (although Percy does manage to use fresh water) as opposed to all liquids.
Yes. Poseidon is. But Percy is only Poseidon's son, and not the god himself.
Additionally, Porky is a much older being than the Olympians, and we see many times that older = more powerful. Such as Gaea being super powerful, and the Titans being generally stronger than the gods, etc...
So - yes, Percy has strong power over water. But Porky is older than ...
It depends on which you believed in the most, or what ritual someone performed for your burial. You also see what you want to see.
We see this quote in The Lighting Thief:
I said, "What're they doing to him?"
"Special punishment from Hades," Grover guessed. "The really bad people get his personal attention as soon as they arrive. ...
We know that Ella has read the Sibylline Books - the books of prophecy that outlined the entire history of Rome, said to have burned when Rome fell.
"Never mind," Frank said. "Listen, we've got to protect Ella, take her with us."
"Of course," Hazel said. "The poor thing needs our help."
"No," Frank said....
Magic in Percy Jackson universe isn't even necessarily genetic in the first place.
This is shown by the fact that children of Athena aren't born genetically from her, and yet still inherit her gifts.
(I will leave aside the actual reproductive biology of the original Greek mythology, where the childbirth can happen from dolphins, bulls, or golden rain).