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Tītiko/Mudflat Snail  Amphibola crenata

Endemic. Not threatened.

If you look over the estuary as the tide recedes, what appears to be numerous bumps are in fact this species of snail. Not only here but it is a very common species on most estuary mudflats around Aotearoa New Zealand but is found nowhere else in the world.

It is neither a true marine or land snail and is able to survive briefly at high tide for an hour or so and then begins to breath air again as the tide falls back.

They feed by grazing the surface for decomposing matter and waste is secreted in wavy strands, clearly visible in the picture opposite.

Large specimens are sometimes eaten.

Wikipedia-Mudflat Snail

saltmarsh snail
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Saltmarsh Snail  Pleuroloba costellaris
Endemic. Not assessed.

This is a very small species of snail measuring no more than 14 mm when adult. Consequently, it is easily overlooked as it is found mainly in vegetation bordering marshy areas, frequently on small bits of driftwood.

Although endemic to Aotearoa New Zealand it is restricted mainly to the North Island with only a few scattered records from the north of the South Island, although because of its diminutive size may be easily overlooked and may have a wider distribution.

It is a fairly abundant species in suitable habitats around the estuary which mainly border the muddier areas such as out from the pines on Pinewood Road.

In some literature it is referred to as Banded Ear Snail.


marinelife.ac.nz-Banded Ear Snail
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Toheroa  Phapies  ventricosa
Endemic. Not assessed.

With adults growing up to 130 mm, this is the largest of the molluscs and one that is an important part of the diet for Māori. Unfortunately, because of commercial over-harvesting and an almost catastrophic collapse in populations there has been a ban, other than for cultural purposes, since 1979. A history of its decline is given in the link below.

Regrettably, the populations have not recovered, and a number of reasons are thought to have contributed to this such as illegal poaching, vehicles on beaches and degraded habitat and is now believed extinct in the Foxton Beach area. Attempts at reintroducing them was only partially successful with numbers decreasing again for the reasons given above.

This is a species under threat and even though a ban has been in place it is not included on the New Zealand Threat Classification System. 


New Zealand Geographic-The Elusive Toheroa
Toheroa
Photo Lindsay Alexander  iNaturalist
Fisheries (Amateur Fishing) Regulations 2013. Prohibition on taking, possessing, or disturbing toheroa
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