BIG SEAL ROCK -SATURDAY 12TH MAY 2012
DIVE 1 - SOUTH EAST CORNER -Five members of the Great Lakes Underwater Group joined Action Divers to complete marine debris surveys, monitor grey nurse sharks and record fish life at Seal Rocks. A chilly wind was from the southwest meant we could not anchor too close so a shot line was put over the stern directly into the gutter.
Anita and I were first in the water and we were met by approximately forty males grey nurse sharks, many juveniles, and twenty females. Quite a few carried scars and one female had tackle trailing from her mouth – the hook way down in her stomach. She was in poor condition. Two others had thick monofilament line (long-line) with large stainless steel hooks and another had the top of its tail chopped off. Fortunately John managed to remove a hook from one individual, but it is frustrating to not be able to help the others.
A random marine debris survey was conducted as at a depth of 20 metres it was too deep to carry out transects, and one large stainless fishing hook with a trace was found and removed.
A fish identification survey recorded blue grouper, red morwong, comb wrasse, maori wrasse, crimson banded wrasse, girdled parma, common and small scale bullseyes, old wives, Moorish idols, half banded sea perch, sweep, mado, wobbegongs, bream, snapper, red rock cods, pufferfish, white cheeked scalyfin, kingfish, one spot pullers, black reef leatherjacket, moray eels and a free swimming older large loggerhead turtle.
The conditions were pleasant with a water temperature of 22 degrees and visibility of 15 metres.
DIVE 2 - WESTERN GUTTER – This dive was to 14 metres which meant Jordon and Brian were able to conduct marine debris transects. They did not find any debris however Anita found another large stainless steel hook with monofilament line buried in the sand on the north east gutter which she took back to the boat with her.
Approximately twenty grey nurse sharks were sighted with one female trailing a long section of fishing line covered in growth. Also recorded were surgeon fish, blue grouper, red morwong, kelp fish, comb wrasse, maori wrasse, crimson banded wrasse, girdled parma, common and small scale bullseyes, old wives, half banded sea perch, sweep, pike, yellowtail scad, wobbygongs, Port Jackson shark, bream, mado, stripeys, pufferfish, blackspot goatfish, luderick, blue damsels, one spot pullers, crested morwong, red morwong, bream, snapper, moray eels, six spine leatherjacket (male and female), Moorish idols, Lord Howe Island butterfly fish, black spot goatfish, blue and yellow fusilier, eastern hulafish and red rock cod.
The water temperature was 22 degrees with visibility at 8 metres however we began to feel the cold and headed back up the anchor to decompress whilst watching a large school of sweep swim about under the boat in the sunlight.
HEATHER ARMOUR.
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