Cuttle enemy line

The Cuttle, Calamar, Man o' War, and Aqua Jelly are species of monsters randomly battled in Golden Sun and Golden Sun: The Lost Age. These monsters, resembling small jellyfish with a pair of arm-like appendages in addition to their tentacles, are palette-swapped variants of each other that have differing levels of power and defense and are fought in different locations in the games. This is a monster line that was introduced in the first game and expanded upon in the second, and is one of the few lines that have four distinctively named variants.

Cuttle
A Cuttle is a turquoise variant with dark purple tentacles. Statistically, this monster has 80 HP, 96 Attack, 22 Defense, 36 Agility, and 1 Luck. In terms of resistance, it has a Mercury Resistance rating of 127, Venus and Jupiter Resistance ratings of 48 each, and a Mars Resistance rating of 7, and it regards to its abilities it uses its available Venus-based attacks with a Venus power rating of 95. Furthermore, this monster is counted as purely of the Mercury element, meaning that even its normally non-elemental offenses are counted as Mercury-element attacks.

The Cuttle uses the following battle commands:
 * Attack: Used 6 out of 8 times, this is this monster's standard physical attack, but for this monster it is counted as a Mercury-based attack rather than a non-elemental attack.
 * Poisonous Bite: Used 2 out of 8 times, this is a Monster Skill where a glowing green holographic image of a pair of jaws chomps at the position of a targeted Adept once, dealing a Venus-based attack equal to its normal physical attack, and having a chance to inflict Poison on the Adept.

Felling a Cuttle yields 27 Experience Points and 49 Coins, and there is a 1/32 chance that the monster will randomly drop a Sleep Bomb. If it is felled by the attack effect of an offensive Mars Djinni, its rewards increase to 35 EXP and 67 Coins, and the chance to drop its item becomes 1/8. In Golden Sun, the Cuttle is battled only throughout the Mercury Lighthouse.

Cuttles are definitely among the "smaller targets" in Mercury Lighthouse, being significantly stronger only over the Ooze. If you get Poisoned by one though, note that your recently-joined Party member Mia would have the Cure Poison Psynergy (assuming you haven't changed her Class already), which for many players essentially removes the necessity for Antidotes.

Calamar
A Calamar is a violet variant with green and orange-tipped tentacles. Statistically, this monster has 104 HP, 130 Attack, 34 Defense, 46 Agility, and 1 Luck. In terms of resistance, it has a Mercury Resistance rating of 127, Venus and Jupiter Resistance ratings of 48 each, and a Mars Resistance rating of 7, and it regards to its abilities it uses its available Jupiter-based attacks with a Jupiter power rating of 95. Furthermore, this monster is counted as purely of the Mercury element, meaning that even its normally non-elemental offenses are counted as Mercury-element attacks.

The Calamar uses the following battle commands:
 * Attack: Used 6 out of 8 times, this is this monster's standard physical attack, but for this monster it is counted as a Mercury-based attack rather than a non-elemental attack.
 * Electric Bite: Used 1 out of 8 times, this is a Monster Skill where a glowing purple holographic image of a pair of jaws chomps at the position of a targeted Adept three times, dealing a Jupiter-based attack equal to its normal physical attack, and having a chance to Stun on the Adept.
 * Ally Search: Used 1 out of 8 times, this is a Monster Skill where the battle text displays "Calamar looks for allies!", and there is a chance that a new Calamar individual will join the battle on the enemy side.

Felling a Calamar yields 59 Experience Points and 79 Coins, and there is a 1/16 chance that the monster will randomly drop an Elixir. If it is felled by the attack effect of an offensive Mars Djinni, its rewards increase to 76 EXP and 102 Coins, and the chance to drop its item becomes 1/4. In Golden Sun, the Calamar is fought throughout Altin Peak, and in The Lost Age it is one of the stock monsters battled all throughout the Great Eastern Sea while sailing.

Calamars are one of the less durable monsters throughout Altin Peak, and throughout the Great Eastern Sea it is both the slowest and least harmful of the monsters battled by ship.

Man o' War
A Man o' War is a yellow variant with violet tentacles. Statistically, this monster has 137 HP, 193 Attack, 42 Defense, 70 Agility, and 1 Luck. In terms of resistance, it has a Mercury Resistance rating of 127, Venus and Jupiter Resistance ratings of 48 each, and a Mars Resistance rating of 7, and it regards to its abilities it uses its available Venus-based attacks with a Venus power rating of 95. Furthermore, this monster is counted as purely of the Mercury element, meaning that even its normally non-elemental offenses are counted as Mercury-element attacks.

The Man o' War uses the following battle commands:
 * Attack: Used 6 out of 8 times, this is this monster's standard physical attack, but for this monster it is counted as a Mercury-based attack rather than a non-elemental attack.
 * Poison Ink: Used 2 out of 8 times, this is a Monster Skill where the monster lobs a red slimy mound at a targeted Adept that evaporates into a red mist, dealing a Venus-based attack equal to its normal physical attack with a chance to inflict Deadly Poison on the target.

Felling a Man o' War yields 55 Experience Points and 87 Coins, and there is a 1/32 chance that the monster will randomly drop an Antidote. If it is felled by the attack effect of an offensive Mars Djinni, its rewards increase to 71 EXP and 113 Coins, and the chance to drop its item becomes 1/8. In Golden Sun, only 5 Man o' Wars are fought, which are as scripted encounters during the Tolbi-bound Ship; first a battle against three at once, then later a battle against two and a Virago. In The Lost Age they are fought as a more traditional random monster throughout Aqua Rock.

In Golden Sun, since so few are fought, they are easily dispatched with area-of-effect offensive Psynergy, and their Deadly Poison-capable attacks aren't seen often. In The Lost Age, they are definitely among the lesser enemies, with sharply less HP than all the other monsters (except the Faery, which nonetheless is much more dangerous due to having literally twice as much Agility). Since battles in general typically don't last more than a few turns each, even if you do get Deadly Poisoned, the cheap and easy Cure Poison Psynergy should always be on hand to cure the poison after battle.

Aqua Jelly
An Aqua Jelly is a turquoise variant with dark purple tentacles (visually identical to the Cuttle). Statistically, this monster has 225 HP, 5 PP, 161 Attack, 33 Defense, 78 Agility, and 7 Luck. In terms of resistance, it has a Mercury Resistance rating of 127, Venus and Jupiter Resistance ratings of 48 each, and a Mars Resistance rating of 7, and it regards to its abilities it uses its available Mercury-based attacks with a Mercury power rating of 125 and its available Venus and Jupiter-based attacks with a power rating of 95 each. Furthermore, this monster is counted as purely of the Mercury element, meaning that even its normally non-elemental offenses are counted as Mercury-element attacks.

The Aqua Jelly uses the following battle commands:
 * Douse: Used 3 out of 8 times, this is a Psynergy spell that drops spheres of water onto the opposition, dealing a Mercury-based attack with a power rating of 25 and a range of 3. This ability consumes 5 of its user's PP. The Aqua Jelly can only use this once per battle of course, but that does not stop it from trying to cast it repeatedly.
 * Poisonous Bite: Used 2 out of 8 times, this is a Monster Skill where a glowing green holographic image of a pair of jaws chomps at the position of a targeted Adept once, dealing a Venus-based attack equal to its normal physical attack, and having a chance to inflict Poison on the Adept.
 * Electric Bite: Used 2 out of 8 times, this is a Monster Skill where a glowing purple holographic image of a pair of jaws chomps at the position of a targeted Adept three times, dealing a Jupiter-based attack equal to its normal physical attack, and having a chance to Stun on the Adept.
 * Attack: Used 1 out of 8 times, this is this monster's standard physical attack, but for this monster it is counted as a Mercury-based attack rather than a non-elemental attack.

Felling an Aqua Jelly yields 96 Experience Points and 99 Coins, and there is a 1/32 chance that the monster will randomly drop a Sleep Bomb. If it is felled by the attack effect of an offensive Mars Djinni, its rewards increase to 124 EXP and 128 Coins, and the chance to drop its item becomes 1/8. In The Lost Age it is fought in many individual scripted battles inside the Lemurian Ship, always once at a time and always by "talking" to each one, and whenever one is felled the Aqua Jelly melts into a Frostable puddle.

Aqua Jellies are essentially meant to be tiny "boss battles". Since you always fight one once at a time with a 4-member party, it should be no problem to defeat each one by just having everyone physically attack. In one particular late room where there's six of them clustered together around some crates, be warned; interacting with the center one will trigger a scripted scene where the six jellies merge together into one Aqua Hydra, which is a powerful boss that must be defeated.