Re: Halal meat
I do not believe anything from (i.e living in it permanently) the sea/river has been deemed haraam... traditionally (not meaning that I endorse this), any kind of invertebrate or reptilian life would be considered makrooh but certainly not haraam.
As for animals, any omnivorous or carnivorous animal are generally excluded from your diet, but not really haraam (unless killed in a certain way), other than Pork which is spoken of specifically.
2:173 He has forbidden you: dead meat (carrion), blood (hence the concept of halaal by draining blood of a slaughtered animal), swine-flesh, and anything (not just meat) that has been *dedicated to other than God *(be it a person, an idol or a tomb 5:3). But if one is forced by necessity, neither intending disobedience, nor exceeding, it will not be a violation that hurts his ‘self’. Indeed, God is Forgiving, Merciful.
5:3 The following things are Forbidden to you:
Carrion, blood, the flesh of swine, anything (not just meat) that has been dedicated to any other than God (such as an idol, grave or saint), any animal that has been strangled to death, or beaten to death, or killed by fall, or gored to death, or (partially) eaten by a wild animal unless you are able to slaughter it while it is still alive (i.e. drain its blood), and (also Forbidden is) what is sacrificed on idolatrous altars (devotional stones or blocks in shrines considered sacred). And (you are forbidden) from dividing one another’s portions through raffling, and divining the future by such means as arrows, for these are deviations. This Day, the rejecters of the Truth have lost all hope of (making compromises with) your System of Life. But, do not fear them, but fear Me. This Day, I have perfected your Law for you, completed My favor upon you, and chosen for you Al-Islam as the System of Life. If anyone is forced by dire necessity (to consume the Forbidden), with no intention of transgression, God is indeed Forgiving, Merciful.
Ancient Jewish tradition even forbids anything with cloven hooves, but then you wouldn't have been enjoying mutton or lamb :D