"prey items" - prey is enough, "items" is unnecessary - so I have removed "items"
the cephalofoil functions to pin down stingrays, - what does "pin down" mean? I interpreted it to mean that it kept the population of stingrays down, but then in the article I see you mean literally pin down. I don't think this wording is good for the lead.
Changed to "immobilize"; open to other suggestions
"The great hammerhead was first described as Zygaena mokarran in 1837 by the German naturalist Eduard Rüppell, who changed it to Sphyrna mokarran later that year" - what is "it"
"It" being the name; made it explicit
"However, for a long time" - vague, not encyclopedic wording
Changed to "over 200 years"
"coined" - are scientific names coined?
In the sense that the person who describes it picks the name, yes
"The lectotype for this species is a male from the Red Sea." - what does this mean?
A lectotype is a specimen chosen after a species has already been described, to serve as the type specimen for that species - I thought it'd be distracting to explain all this in the article
"the ancestral condition" - unclear what this means
The ancestral condition is the trait exhibited by the ancestors, in this case it means the earliest hammerheads had large cephalofoils - reworded to make this clearer
"Its presence is uncertain off Gambia, Guinea, Mauritania, Sierra Leone," - what does this mean?
It's what the IUCN report says; I'd interpret it as meaning that there are large hammerheads in those regions suspected to be great hammerheads, but identification is not 100% certain - I reworded the sentence
"documented as moving closer to the poles in the summer" - is this both north & south poles?
Yes - they follow warming water in the summer, which means northward in the northern hemisphere and southward in the southern hemisphere
Hope my notes are clear! —Mattisse (Talk) 22:33, 27 April 2009 (UTC)
Addressed comments; not sure whether you wanted me to change things for some of them or not. -- Yzx (talk) 23:13, 27 April 2009 (UTC)
You have done a good job. —Mattisse (Talk) 23:30, 27 April 2009 (UTC)