Possible Clues:

• Swimmer who goes down without any breathing equipment
• Swimmer with flippers
• Aqueous kind, I've rage to submerge
• Swimmer and slacker going across India
• One might go after pearls
• Idle chap devouring Independent — he'd go to bed out of habit?
• One not going to bed in suit is ultimately warmer without I see
• Underwater swimmer
• Type I've noticed beneath surface of sea, right?
• One unsuited to underwater activity